Central Luzon Research Articles

Livelihood diversification and household welfare among farm households in the Philippines

AbstractDiversification of income sources is one of the most common strategies households employ to minimize household income variability and to ensure a minimum level of income that guarantee their food security. This study examines the impact of livelihood diversification on farm profits among smallholder rice farmers in the Central Luzon Region (CLR) of the Philippines using long‐term farm‐level panel data spanning from 1966 to 2016. We employed a random‐effects ordered probit model to investigate the drivers of livelihood diversification and then used the mixed Markov chain model to analyze the transition of households from less to more diversified livelihoods and its impact on farm profits over time. Our findings reveal substantial diversification among households over time. In particular, the elevation of the farm location is a key driver of rice farm households’ probability to diversify. The estimates show that an increase in the latitude of the farm location increases the probability of rice farmers in the CLR to diversify. We find that 64% of the rice farm households constitute farmers for whom diversification can be a strategy for survival. For medium‐ to high‐profit farm categories, diversification tends to protect farmers against farm profit losses arising from adverse climatic and weather variability.

Critical thinking disposition and learning approach as predictors of mathematics performance

In the Philippines, improving pre-service math teachers’ critical thinking is receiving increasing attention, emphasizing the importance of tailoring instructional methods to students’ learning approaches for a more equitable environment and enhanced mathematics performance. Thus, this study aimed to determine if the critical thinking disposition subscales (reflective, attentiveness, open-mindedness, organization, perseverance, and intrinsic motivation) and learning approach (deep approach and surface approach) predict the mathematics performance of pre-service math teachers. This study employed a descriptive-correlational research design to randomly selected 125 pre-service math teachers from Central Luzon, Philippines. The survey instruments are administered through the student-educator negotiated CTDs scale, the revised two-factor study process questionnaire, and the 40- item validated test. Using descriptive analysis, findings revealed that preservice mathematics teachers have moderate levels of CTD, most of which use a deep approach and have average mathematics performance. Regression analysis showed that CTD and the deep approach were predictors. Therefore, pre-service mathematics teachers with a higher CTD and a deep approach are likelier to perform better in mathematics. These findings provide valuable insights into enhancing mathematics teacher education.

Development of research agenda of a teacher education institution in Central Luzon, Philippines

This collaborative-participatory research aimed to develop the research agenda of the college of teacher education (CTE) of a state university in Zambales, Philippines from 2017 to 2021. The research involved the core research group, faculty researchers, campus and university officials, and stakeholders such as students, alumni, and partner agencies (department of education (DeEd) faculty and administrators). The study was carried out in the first quarter of 2017 to develop the CTE research agenda framework, identify the key research areas, and present to the stakeholders. During the third quarter of 2018, the developed research agenda was revisited and reformulated as the university was converted into a more comprehensive university. A total of six themes were included in the final CTE research agenda framework with corresponding theme descriptions and research topics. The use of participatory-collaborative research effectively develops a college research agenda of the CTE. The processes involved in research agenda setting can serve as a basis for other teacher education institutions (TEIs) in coming up with their respective research agenda geared towards uplifting the quality of teacher education. The study could also serve as a guide for other colleges in formulating and revisiting their research agenda.

Molecular Characterization of a Clade 2.3.4.4b H5N1 High Pathogenicity Avian Influenza Virus from a 2022 Outbreak in Layer Chickens in the Philippines.

H5 subtype high-pathogenicity avian influenza (HPAI) viruses continue to devastate the poultry industry and threaten food security and public health. The first outbreak of H5 HPAI in the Philippines was reported in 2017. Since then, H5 HPAI outbreaks have been reported in 2020, 2022, and 2023. Here, we report the first publicly available complete whole-genome sequence of an H5N1 high-pathogenicity avian influenza virus from a case in Central Luzon. Samples were collected from a flock of layer chickens exhibiting signs of lethargy, droopy wings, and ecchymotic hemorrhages in trachea with excessive mucus exudates. A high mortality rate of 96-100% was observed within the week. Days prior to the high mortality event, migratory birds were observed around the chicken farm. Lungs, spleen, cloacal swabs, and oropharyngeal-tracheal swabs were taken from two chickens from this flock. These samples were positive in quantitative RT-PCR assays for influenza matrix and H5 hemagglutinin (HA) genes. To further characterize the virus, the same samples were subjected to whole-virus-genome amplification and sequencing using the Oxford Nanopore method with mean coverages of 19,190 and 2984, respectively. A phylogenetic analysis of the HA genes revealed that the H5N1 HPAI virus from Central Luzon belongs to the Goose/Guangdong lineage clade 2.3.4.4b viruses. Other segments also have high sequence identity and the same genetic lineages as other clade 2.3.4.4b viruses from Asia. Collectively, these data indicate that wild migratory birds are the likely source of H5N1 viruses from the 2022 outbreaks in the Philippines. Thus, biosecurity practices and surveillance for HPAI viruses in both domestic and wild birds should be increased to prevent and mitigate HPAI outbreaks.

Molecular characterization and identification of African Swine Fever virus isolates from emerging cases of infection in Central Luzon, Philippines

A study that evaluated the molecular characteristics to confirm the identity of the African Swine Fever (ASF) pathogen from emerging cases of infection in Central Luzon, Philippines was initiated. The study involved the collection of 125 blood samples from pigs during the four-month duration of the study when clinical signs of ASF was prevalent in the four out of seven provinces of Central Luzon, Philippines. This work included the amplification of the p72 gene in DNA samples through PCR and confirmation of the identity of the ASF pathogen through DNA sequencing. The DNA sequences of the p72 gene of the ASF pathogen are made up of 412 nucleotides and used as a basis in identifying the Philippine ASF pathogens as ASF virus PH/CL 4/2022, ASF virus PH/CL 3/2022, ASF virus PH/CL 2/2022 and ASF virus PH/CL 1/2022. Philippines ASF virus isolates showed 100% sequence similarity with sequences reported from Malaysia ASF isolate MVZT218/2021, Vietnam ASF isolate D/ASFV/VN/DN-VC/2019, and India ASF isolate ASF/MZ/IND/3 based on BLASTN homology search in the NCBI database. The results of the study revealed close phylogenetic relationships among ASF isolates from Vietnam, Malaysia, India and the Philippines.

"Lusog-Linang": Utilizing Community-engaged Research towards Capacity Building in Health of an Underserved Community.

Nurses have a pivotal role in nurturing the capabilities of individuals, families, and population groups for better health. However, underserved communities in the Philippines, such as those with socioeconomic inadequacies, geographic isolation, and service access problems, have significant limitations in attaining the highest possible level of health. Hence, a community extension service (Project "Lusog-Linang"), employing community-engaged research, was launched with the residents of an underserved locality in Central Luzon. The current paper aimed to describe the engagement of the community residents in describing their current health situation and related priority problems, as well as explore appropriate initiatives to manage the identified problems. Community-engaged research was utilized to enable the residents of Barangay San Vicente, Bamban, Tarlac to participate in health capacity building. Particularly, records review and focus group discussions were conducted to assess the community's health needs and to identify the residents' perceived problems. The findings were presented in a community assembly, where residents further discussed their priority health concerns and potential interventions to address them. Quantitative data were summarized through descriptive statistics, while qualitative information was synthesized via content analysis. The priority community health problems included healthcare inaccessibility (trained staff, health equipment, and facility access), food insecurity, water supply limitations, and environmental sanitation. Moreover, there was inadequate knowledge and skills among the residents in health promotion, disease prevention, and illness management. While Barangay San Vicente had limited socioeconomic resources to optimize their health capacities, the sense of community among the residents is a vital resource towards empowering them to improve their health. The results could be utilized as a launching pad for developing appropriate health programs for the residents of Barangay San Vicente. Hence, the next steps in Project "Lusog-Linang" should include the identification and training of core group members toward community mobilization, and further exploring collaborative and sustainable partnerships across organizations to ensure that the community will have long-term solutions to their problems. Consequently, this project could guide public health workers in ensuring the active involvement and participation of the community members in managing their own health.

Genotyping of red tilapia strains in Central Luzon Philippines targeting ESR1 gene

Tilapia is an economically important commodity worldwide. Marker-assisted selection (MAS) has been practiced in livestock culture to ensure the selection of a specific trait that will benefit the culture system. This study assessed the allelic variation in six red tilapia strains in Central Luzon, Philippines. Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) was done to evaluate the genotypes of six strains of red tilapia using intron one portion of the chromosome one of the estrogen receptor 1 (ESR1) gene. The target gene was amplified using primers designed in previous study and then subjected to RFLP using PvuII restriction enzyme. Single Nucleotide Polymorphisms (SNPs) were also evaluated in six DNA sequences. Results showed that 18 red tilapia samples were found to be of the AA genotype. Aligned sequences of the 122 bp ESR1 gene revealed that among six red tilapia strains, there are 117 identical pairs, three transversional pairs, and three transitional pairs. The SNPs observed can be used to identify restriction enzymes that discriminate different genotypes in the target gene. Association studies can be done to determine the genotypes that are linked to specific traits in cultured animals.

Second Language Writing Anxiety among Faculty Scholars of a State University in the Philippines and Its Sex-Disaggregated Data

The study investigated the causes and the nature of writing anxiety specifically in the use of English as the second official language of the Philippines. Further, it accounted and analyzed its sex-disaggregated data. This was done among faculty scholars of Central Luzon State University. The respondents were randomly chosen from among the purposively identified faculty scholars of the university pursuing their graduate degrees - master’s and doctorate, in the different graduate curricular offerings in various universities in the Philippines and abroad, that require a thesis or dissertation as the final requirement for obtaining a graduate degree. The Second Language Writing Anxiety Inventory (SLWAI) of Cheng (2004), a questionnaire composed of 22 items with three open-ended questions was used to collect responses. The responses were scored and measured on a five-point Likert response scale. The differences in Second Language Writing Anxiety (SLWA) between male and female participants were analyzed using the Mann-Whitney Test, which is ideal for analyzing statistically the difference between the distributions of data of unparalleled groups with the comparison of ranks and scores. Based on the study findings, the most prominent nature of SLWA among participants is cognitive anxiety. Other sources of anxiety include the availability of external and internal resources and environmental elements. In relation to sex, males scored higher in terms of the level of anxiety compared to females. Lastly, it is forwarded that educators and the pedagogical approach may utilize a positive feedback mechanism as negative evaluation promotes anxiety even in composing in a second language.

Metacognitive Awareness as a Predictor of Mathematical Modeling Competency Among Preservice Elementary Teachers

<p style="margin-left:28px; text-align:justify">Mathematical modeling offers a promising approach to improving mathematics education. This study aims to determine if the concept of metacognitive awareness in the learning process is associated with mathematical modeling. This study also considers the interaction effect of sex and academic year level on both variables. Focusing the study on preservice elementary teachers might address potential issues and targeted intervention in their preparation program concerning their ability to teach and guide young learners in modeling activities. The research sample includes 140 preservice elementary teachers at Central Luzon State University, Philippines. Data collection used an adapted metacognitive awareness inventory and a validated researcher-made mathematical modeling competency test aligned with the K-12 mathematics curriculum in the Philippines. Results revealed that the preservice elementary teachers had a high metacognitive awareness and mathematical modeling competency, ranging from 22 to 31 out of 36 points. Besides, Factorial ANOVA indicates that academic year level positively affects both variables regardless of sex, and stepwise regression analysis unveiled that information management, declarative knowledge, and planning significantly predict 41.4% of the mathematical modeling competency variance. This suggests that developing metacognitive awareness supports preservice elementary teachers in performing modeling tasks that improve their competency level in mathematics.</p>

I-WARM: Development of a Board Examination Reviewer Web Application for Filipino Pre-Service Physical Educators Utilizing the Unified Spaced Repetition and Hypercorrection Techniques

One of the major parameters by which college graduates' productivity is gauged is their board examination performance. Relevantly, the development and utilization of sophisticated tools and technology to facilitate reviews are encouraged and worthy of such exploration. The study aimed to develop an integrated web application reviewer for MAPEH (music, arts, physical education, and health) (i-WARM) with the use of unified spaced repetition and hypercorrection techniques. This descriptive research and development (R & D) design was used and employed a nine-step process in which functions were built for effective learning and retention of concepts. The evaluation was conducted by 106 graduating Bachelor of Physical Education students from a teacher education institution in Central Luzon, Philippines. Results revealed that the i-WARM is easy to use and easy to learn as it was viewed as clear and understandable, accessible, and has a flexible feature and interface. Pre-service physical educators perceived that the services provided by the web application are useful for their review as it was rated functional and informative. Frequent problems such as crashes and downtimes were not observed by the user during their exposure to the web application. The i-WARM could be explored as a potential aid in assisting learners to acquire concepts easily through an interactive interface. This may likewise assist teachers and students in establishing retention of significant concepts for future licensure examinations.

Novel records of parasitoids targeting fall armyworm, <i>Spodoptera frugiperda</i> (J. E. Smith) (Lepidoptera: Noctuidae), in rice-corn-based cropping systems in the Philippines

In the Philippines, the Fall Armyworm (FAW) was initially documented infesting corn in June 2019 and rice in May 2021. Relying on commercially available insecticides as the primary, if not exclusive, management strategy raises concerns about potential issues arising from FAW developing resistance to these chemicals, and the associated risks these insecticides pose to non-target organisms and the environment. To address these challenges, it is imperative to explore potential naturally occurring indigenous biological control agents and entomopathogens of the FAW. Regular field samplings and monitoring of FAW and its natural enemies were systematically conducted in selected municipalities of Central and Northern Luzon, as well as the Cagayan Valley regions of the Philippines. FAW larvae suspected of parasitization were collected from the field and subsequently reared in the laboratory for parasitoid emergence and other natural enemies. The parasitoids that emerged were sent to the Centre for Agriculture and Biosciences International United Kingdom (CABI UK) Diagnostic and Advisory Service for identification. Two hymenopteran parasitoids, Brachymeria lasus Walker (Family: Chalcididae) and Copidosoma floridanum (Ashmead) (Family: Encyrtidae), were identified from the lab-reared FAW larval samples. These two FAW parasitoids are new records in the Philippines and elsewhere.

Knowledge, attitudes, and practices related to dengue among public school teachers in a Central Luzon Province in the Philippines: an analytic cross-sectional study

BackgroundDengue has become a major health issue in tropical regions as the numbers of reported cases and estimated infections continuously increase. In the Philippines, many challenges remain in preventing and controlling the disease amidst all the mitigation efforts of the government. This study sought to measure the health literacy of Filipino teachers and determine the associations among teachers’ knowledge, attitudes, and selected practices (KAP) against dengue.MethodsElementary and secondary school teachers from the consistently declared dengue hotspots in the City of San Fernando, Pampanga, Philippines, from the years 2017 to 2019 were selected as target participants in this cross-sectional study. A self-administered online survey tool was used in this study for both screening of participants and the KAP survey proper. STATA, descriptive statistics, and multiple logistic regression were used for the data analysis. Odds Ratios (ORs) and 95% confidence intervals (CIs) were reported.ResultsThe study comprised 604 participants whose mean age was 38.4 years. Television was determined as the top media source of information, and various health staff were the most trusted and common source of information. Good knowledge on dengue treatment (OR = 1.81; 95% CI 1.18–2.78) and dengue prevention (OR = 1.85; 95% CI 1.26–2.71) were positively associated with having good practices on protection against mosquito bites. Good knowledge on dengue signs and symptoms (OR = 1.56; 95% CI 1.02–2.37) and dengue prevention (OR = 2.38; 95% CI 1.59–3.58) were positively associated with having good practices on preventing breeding sites. Those with positive perceived susceptibility to dengue had lower odds of having good practices on protection against mosquito bites (OR = 0.64; 95% CI 0.41–0.99) and of having good practices on preventing breeding sites (OR = 0.46; 95% CI 0.26–0.81).ConclusionEven with the existing dengue policies, programs, and strategies, and the high disease literacy rate of Filipinos, dengue remains a struggle with an increasing case rate. Therefore, specific concepts should be emphasized, and interventions should be fine-tuned to better reach and influence the target population to attain a dengue-free Philippines.

Assessment of the Library Collection of the Central Luzon State University Library: Basis of the Collection Development Program

Objective – The collection assessment project of the University Library is significant in determining whether the quantity of the collection meets the regulatory standard of the Commission on Higher Education (CHED) for academic libraries. This study specifically sought to find the level of library collection compliance in terms of major subject courses, to determine the curricular programs that are compliant with the standard or have a high rate of compliance, and to identify the curricular programs that should be prioritized in acquiring additional book titles. Methods – The assessment was conducted using an action research model of iterative reflection and improvement. It follows the four steps for carrying out the research: plan, act, observe, and reflect, as proposed by Davidoff and Van den Berg (1990). Furthermore, we employed CHED Memorandum Order (CMO) No. 22, Series of 2021, Section 4 (b.4-5) to analyze the collection's compliance based on its quantity. The data was presented using a table and percentage. Results – There are 32 undergraduate curricular programs offered at Central Luzon State University, which include 1,055 major subject courses. More than half of major subject courses (57.3%) on various curricular programs are non-compliant with CHED criteria, including 17.63% of major subject courses with zero titles copyrighted within the last five years. Findings also reveal that only 6 (18.75%) of the total programs were able to reach above 70% compliance with CHED standards, and there are 23 curricular programs with title gaps of 50% or higher that need to be prioritized in the acquisition of book titles. Conclusion – The library collection assessment technique is crucial for identifying gaps in the collection and determining areas where additional resources may be required. As the findings indicate that more than half of the major subject courses do not meet the requirements set by CHED, the librarians have been investigating ways to acquire additional academic sources to fill this gap. However, their current efforts are not yet enough to meet the requirements. A long-term plan for gradually building up the collection has been devised.

Knowledge, Attitude, and Practices on Climate Change Among Rice Farmers in Central Luzon, Philippines

The Philippines has been listed as the topmost affected country by climate change. One of the sectors affected by this climatic change is the agricultural sector. This study aimed to document the knowledge, attitude, and practices (KAPs) on climate change among rice farmers as a baseline study in disseminating the practices on disaster risk reduction management to rice farmers in Central Luzon to reduce risks and improve the rice yield and income of rice farmers. A total of 969 respondents were randomly sampled from the seven provinces of Central Luzon. A survey questionnaire and an unstructured questionnaire were used as instruments in gathering the needed data. Descriptive and thematic analysis were used in analyzing the data. Results revealed that rice farmers are knowledgeable and have favorable attitudes toward the impact of climate change on farming. They sometimes practice climate-smart agricultural practices. Generally, the farmers are affected by weather and climatic conditions as well as the hazards that cause a reduction in rice yield. Climate change has affected farmers in their social well-being, economic aspect, and rice production. In terms of climate change disaster adaptation measures, the farmers sometimes adopt measures in terms of flood and drought and seldom adopt measures in typhoons, erosion, and volcanic eruptions. The study recommends the conduct of capability training on disaster risk reduction in rice production (such as early planting and planting of high-yielding varieties) based on the specific needs of each province.

Dr. Wolfram Meys Stonefly (Insecta: Plecoptera) Collection from Luzon, Philippines: Part I. Perlidae.

In this study, the Perlidae stonefly collections of Dr. Wolfram Mey from over 20 years ago have been examined. Neoperla jhoanae sp. nov. from Central Luzon Region and Neoperla nagaensis sp. nov. from Bicol Region are described herein. Additional records and information are also provided on Neoperla jewetti Sivec, 1984, Neoperla recta Banks, 1913, Neoperla pseudorecta Sivec, 1984, Neoperla oculata Banks, 1924, Neoperla nigra Sivec, 1984, Phanoperla bakeri (Banks, 1924), and Phanoperla flaveola (Klaplek, 1910).

Agritourism in Central Luzon, Philippines: Status, Challenges, and Pathways to Sustainable Growth

This study explores the status, challenges, and pathways to sustainable growth in Central Luzon, Philippines agritourism. Data from agritourism trainers, farm owners, trainees, and stakeholders are analyzed using a descriptive research design and statistical tools such as Multivariate Tests, Wilks' Lambda (Exact Statistic), and Spearman's Rank-Order Correlation. The research identifies significant variations in agritourism status across site characteristics and underscores the importance of tailored management approaches. Moreover, it reveals a positive correlation between knowledge acquisition and utilization, emphasizing the role of training in enhancing agritourism practices. Despite challenges like waste management and bureaucratic hurdles, agritourism is recognized as a valuable driver of economic development in Central Luzon, offering opportunities for rural communities and sustainable agriculture. This study's implications inform policymakers, educators, and government officials, providing insights for agritourism program development and policy formulation, ultimately contributing to regional economic growth and community well-being.

Host plants and nymph morphology of an endemic treehopper, Pyrgonota bifoliata, in the Mount Makiling Forest Reserve, Luzon, Philippines

ABSTRACT Pyrgonota bifoliata (Insecta: Hemiptera: Membracidae) is a distinct endemic Philippine treehopper species complex distinguished by its extremely elevated and bifurcated pronotal structures. An earlier study suggested that P. bifoliata is a host specialist that feeds on Bridelia (Phyllanthaceae) in northern Luzon and Rubus (Rosaceae) in southern Mindanao. However, the host plant range across the geographical distribution of the P. bifoliata species complex is still poorly understood. In this study, field observations and DNA barcoding were performed to determine the host plant range of P. bifoliata in the Mount Makiling Forest Reserve of Laguna Province on the island of Luzon. The morphology of the last-instar nymph of P. bifoliata was described to facilitate the identification of the species and its host plants. Behavioural interactions between P. bifoliata and its associated ants were also recorded. The results revealed that Piper umbellatum (Piperaceae) and Saurauia latibractea (Actinidiaceae) were the major host plants used by both nymphs and adults of P. bifoliata. The findings indicate that P. bifoliata in the Mount Makiling Forest Reserve of central Luzon is a polyphagous host generalist that primarily utilises two distantly related plant species. The adults of P. bifoliata also occur on Alangium longiflorum (Cornaceae) and Ficus ulmifolia (Moraceae). The nymphs of P. bifoliata are gregarious in small groups and visited by three ant species (Crematogaster sp., Pheidole sp. and Technomyrmex sp.); however, the adults of P. bifoliata are solitary and are never observed with ants. Unlike other treehoppers that are subsocial, the females of P. bifoliata exhibited no maternal care behaviours, such as egg or nymph guarding.

Tree Species Composition and Diversity in a Secondary Forest along the Sierra Madre Mountain Range in Central Luzon, Philippines: Implications for the Conservation of Endemic, Native, and Threatened Plants

The Sierra Madre Mountain Range (SMMR) is the backbone of the Luzon Islands that contains a high concentration of highly important ecological resources distributed among the 68 protected areas therewith. The present study aimed to assess the composition and diversity of tree species in a secondary forest within the SMMR. A 2.25 km transect with 10 900-m2 plots were established to record tree species with a diameter at breast height of at least 10 cm. The findings revealed 148 individuals of trees from 38 morphospecies, 28 genera, and 20 families. Importance values unveiled the Aurora endemic Macaranga stonei Whitmore as the most important species in terms of the relative values of its abundance, frequency, and dominance. The area was also found to be home to 33 natives, 12 endemics, five IUCN threatened species, and nine Philippine threatened trees. Furthermore, the study site was also found to have considerably high diversity, with a Shannon–Weiner Index value of 3.269 and a relatively even distribution of individuals among species, as supported by the Simpson’s Evenness index value of 0.9453. Significant correlational relationships were also found among species richness, Shannon–Weiner index, and Simpson’s Evenness index, with correlation coefficients ranging from 0.881 to 0.934, with all significant at p < 0.001. Lastly, the study was able to produce a distribution map, which is necessary for implementing targeted conservation strategies. These findings provided valuable implications for future research and implementation of targeted and participatory biodiversity conservation and protection strategies.

Forecasting the Impact of Climate Change on Rice Crop Yields under RCP4.5 and RCP8.5 Scenarios in Central Luzon, Philippines, Using Machine Learning Algorithms

Climate change poses a significant threat to the agricultural sector around the world, and it could impact the rice crop yields of the Philippines's major rice-producing provinces in Central Luzon; thus, there is a need to investigate the possible influence, both in the near and long term, of climate change on rice crop yields in these major rice-producing provinces. This paper presents the use of random forest, gradient boosting, regression analysis, and artificial neural network (ANN) methods for modeling climate factors (pressure, temperature, relative humidity, rainfall, wind, cloudiness, and sunshine) and rice crop yield (RCY) data from Central Luzon, Philippines, covering the years 2009 to 2018. The projected temperature and rainfall for Representative Concentration Pathways 4.5 and 8.5 (RCP4.5 and RCP8.5, respectively) scenarios were used as input to the models to estimate the possible influence of climate change on the rice crop yields in the rice-producing provinces in Central Luzon. The results suggest an increase in temperature of 1.14 °C in RCP4.5, which surges to 1.62 °C in RCP8.5, and an increase in rainfall by a mean of 3.70 mm in RCP4.5 and 12.28 mm in RCP8.5. Furthermore, three of the models: ANN, random forest (RF), and gradient boosting (GB) showed an increase in RCY, while linear regression (LR) showed a decrease in RCY for both the RCP4.5 and RCP8.5 scenarios compared to the current RCY. Therefore, it is uncertain whether climate change, as characterized by rainfall and temperature, will have a positive or negative impact on rice crop yields in Central Luzon, Philippines.

Quantitative Inquiry on Employees' Mental Health Status, Job Satisfaction, and Organizational Commitment of a State University in Central Luzon, Philippines

The study aimed to determine the job satisfaction, organizational commitment, and mental health status of employees of a state university. More so, it sought to assess the significant difference in the employees' level of job satisfaction, organizational commitment, mental health status according to their profile. In addition, the relationship of these variables was also analyzed. The study utilized a descriptive quantitative approach to identify the level of job satisfaction, organizational commitment, and mental health status of the 384 conveniently selected employees of a state university in Central Luzon, Philippines. Descriptive and inferential statistics were employed in analyzing the collected data through Statistical Package Social Science (SPSS) version 23 software. The study found out the employees of a state university differ on their job satisfaction, organizational commitment and mental health status, when grouped according to their profile. The study also inferred that there is an inverse correlation between the employees’ mental health status and their satisfaction; and on the employees’ organizational commitment and their mental health status. Conversely, the study implied that as satisfaction of employees increases, their organizational commitment also increases.