Correlational Study Research Articles

Deciphering the Conformations of Glutathione Oxidized Peptide: A Comparative NMR Study in Solution and Solid-State Environments.

Glutathione (GSH) and its oxidized dimer (GSSG) play an important role in living systems as an antioxidant, balancing the presence of reactive oxygen species (ROS). The central thiol (-S-S-) bond in GSSG can undergo free rotation, providing multiple conformations with respect to the S-S bridge. The six titratable sites of GSSG, which are influenced by pH variations, affect these conformations in solution, whereas in solids, additionally crystal packing effects come into play. In view of differing reports about the structure of GSSG in literature, we have here conducted an extensive reexamination of its conformations using NMR, and contrasting results have been obtained for solution and solid state. In solution, the existence of more than one antiparallel orientation of the monomer unit with different hydrogen bonding schemes has been indicated by NOE and amide temperature coefficient results. On the other hand, in the solid-state, a 1H-1H double-quantum (DQ) to 13C single-quantum (SQ) correlation study has confirmed a parallel orientation, consistent with the reported X-ray crystal structure. Experimentally assigned solid-state NMR resonances have been validated using GIPAW calculations incorporated in the Quantum ESPRESSO package.

Assessment of neutralizing antibody response as a correlate of protection against symptomatic SARS-CoV-2 infections after administration of two doses of the CoronaVac inactivated COVID-19 vaccine: A phase III randomized controlled trial

The emergence of variants of concerns of SARS-CoV-2 highlights the need for comprehensively elucidating the correlates of protection for different COVID-19 vaccine types. Inactivated COVID-19 vaccines are currently amongst the most widely administered vaccines globally. However, investigations into the correlates of protection for inactivated COVID-19 vaccines are relatively rare. Data from a phase III double-blind, randomized, placebo-controlled clinical trial (NCT0445659) that evaluated the efficacy and safety of the CoronaVac vaccine in healthcare professionals were utilized in this secondary analysis. Additionally, the correlation between neutralizing antibody levels measured by micro-cytopathic effect (CPE) neutralization assay and the occurrence of laboratory-confirmed infections was assessed using neutralizing antibodies measured in blood samples collected on day 28 after receiving two doses of the vaccine. Finally, the protective threshold required to provide 50% protection against symptomatic illness and virus infections was estimated. The risk of infection was negatively correlated with the levels of post-vaccination neutralizing antibodies measured on day 28 after the second dose. A neutralization titer of 30 (95% CI: 2-56) was predicted to provide 50% efficacy against symptomatic infection, whilst a titer of 42 (95% CI: 24-62) was predicted to provide 50% efficacy against total infection. Lastly, a neutralization titer of 247 (95% CI: 139-506) or higher was required to achieve 80% or higher protection against symptomatic infections. The results highlight the value of neutralizing antibody response as a correlate of protection, which can be used to inform future vaccine development and implementation. Further studies of immune correlates of protection for other vaccines are warranted.

Sex differences in prelimbic cortex calcium dynamics during stress and fear learning

In recent years, research has progressively increased the importance of considering sex differences in stress and fear memory studies. Many studies have traditionally focused on male subjects, potentially overlooking critical differences with females. Emerging evidence suggests that males and females can exhibit distinct behavioral and neurophysiological responses to stress and fear conditioning. These differences may be attributable to variations in hormone levels, brain structure, and neural circuitry, particularly in regions such as the prefrontal cortex (PFC). In the present study, we explored sex differences in prelimbic cortex (PL) calcium activity in animals submitted to immobilization stress (IMO), fear conditioning (FC), and fear extinction (FE). While no significant sex differences were found in behavioral responses, we did observe differences in several PL calcium activity parameters. To determine whether these results were related to behaviors beyond stress and fear memory, we conducted correlation studies between the movement of the animals and PL activity during IMO and freezing behavior during FC and FE. Our findings revealed a clear correlation between PL calcium activity with movement during stress exposure and freezing behavior, with no sex differences observed in these correlations. These results suggest a significant role for the PL in movement and locomotion, in addition to its involvement in fear-related processes. The inclusion of both female and male subjects is crucial for studies like this to fully understand the role of the PFC and other brain areas in stress and fear responses. Recognizing sex differences enhances our comprehension of brain function and can lead to more personalized and effective approaches in the study and treatment of stress and fear-related conditions.

Confirmatory Factor Analysis of the Sustainable Development Goals Derived Gentrification Scale in the Context of the Pandemic

In the context of human development goals, gentrification has emerged as a significant and unpredictable phenomenon amid the ongoing health crisis, potentially impacting the sustainable development goals (SDGs). This study aimed to analyze the theoretical framework of gentrification and its empirical indicators in the unique context of the pandemic, foreseeing potential risk scenarios. A cross-sectional, psychometric, and correlational study was conducted with 100 university students dedicated to the SDGs during the pandemic. The findings revealed the prevalence of two out of seven factors associated with poverty alleviation and institutional justice for peace. Given the observation of seven factors in the current literature, this study recommends expanding the indicators to enhance the variance percentage and aligning the theoretical model with empirical evidence. It underscores the pressing need for collaborative efforts in urban and sustainable development.

Hurst Exponent and Event-by-Event Fluctuations in Relativistic Nucleus–Nucleus Collisions

A joint study of multi-particle pseudo-rapidity correlations and event-by-event fluctuations in the distributions of secondary particles and fragments of the target nucleus and the projectile nucleus was carried out in order to search for correlated clusters of secondary particles. An analysis of the collisions of the sulfur nucleus with photoemulsion nuclei at an energy of 200 A·GeV is presented based on experimental data obtained at the SPS at CERN. The analysis of multi-particle correlations was performed using the Hurst method. A detailed analysis of each individual event showed that in events of complete destruction of a projectile nucleus with a high multiplicity of secondary particles, long-distance multi-particle pseudo-rapidity correlations are observed. The distribution of average pseudo-rapidity in such events differs significantly from others, as it is much narrower, and its average value is noticeably shifted towards lower values <η>.

Mediating role of academic competence in the relationship between perceived teaching style and academic resilience among adolescents

BackgroundAcademic resilience is crucial for adolescents as it enables them to overcome challenges and achieve educational success, yet the mechanisms underlying its development remain inadequately understood. This study investigated the mediating role of academic competence in the association between perceived teaching style and academic resilience among adolescents.MethodsThis descriptive correlational study was conducted between June 2022 and December 2022. The statistical population for this study encompassed all high school students in Tehran. To ensure the representativeness of the sample, a stratified random sampling technique was employed, involving a total of 400 high school students. Data were collected using online questionnaires, including the Academic Resilience Inventory (ARI), Teacher as Social Context (TASC), and Academic Competence Evaluation Scale (ACES). Descriptive statistics (e.g., mean, standard deviation, correlation matrix) and inferential statistics (e.g., path analysis) were used to analyze the data through SPSS-23 and LISREL version 8.7.2.ResultsThe findings demonstrate significant relationships between teaching styles, academic competence, and academic resilience. Specifically, path analysis reveals that teaching styles, particularly those emphasizing support and involvement, have direct and meaningful effects on academic competence, subsequently influencing academic resilience. The proposed model exhibits a good fit, as evidenced by various fit indices (p < .05).ConclusionThis study underscores the pivotal role of supportive and engaging teaching styles in fostering academic resilience among adolescents. By significantly enhancing students’ academic competence, these teaching approaches contribute to their overall well-being. These findings offer valuable insights for educators and policymakers to develop strategies that cultivate both academic skills and emotional strength, ultimately leading to improved educational outcomes.

Breaking the Loop: A Meta‐Analysis on the Bidirectional Effects of Materialism on Social Well‐Being Outlining Future Research Directions

ABSTRACTThis meta‐analysis examines correlational and experimental research linking materialism—broadly understood as an excessive focus on acquiring wealth and possessions that convey status—and social well‐being—characterised by healthy interpersonal relationships and a sense of social support and integration. We identified 55 reports containing 72 independent studies and 123 effect sizes (N = 44,376). Meta‐analytic calculations yielded a pooled effect of r = −0.18, suggesting that the effects of materialism on social well‐being (e.g., loneliness or relationship satisfaction) may be greater than the effects of materialism on individual well‐being (e.g., self‐esteem or life satisfaction). Moderation analyses revealed that the effects are bi‐directional, consistent across genders and cultures and significantly stronger in children and adolescents. These findings emphasise the universal and reciprocal link between materialism and social well‐being and highlight the particular vulnerability of younger populations. Based on the results, we propose suggestions for further research to address the existing gaps and strengthen the current evidence, and recommend a sample size of 240 participants for correlational studies and 50 participants per group for experimental research. This work calls for targeted interventions and policies to tackle the adverse social effects of materialism, particularly among young populations.

The relationship between emotional inhibition, emotional deprivation, failure, vulnerability to harm schema, and severity of symptoms among patients with obsessive-compulsive disorder

ObjectiveAssess the relationship between emotional inhibition, emotional deprivation, failure, vulnerability to harm schema, and severity of symptoms among obsessive-compulsive disorder.MethodsA descriptive correlational study was conducted on 30 patients with obsessive-compulsive disorder who were recruited to complete the Yale-Brown Obsessive-Compulsive Scale, Young Schema Questionnaire-Long Form.ResultsThe results of the study indicate that 66.6% of the 30 subjects exhibited high levels of OCD symptom severity, with a mean score of 33.20 ± 4.67. In terms of early maladaptive schemas, 60% of subjects displayed severe emotional deprivation, 66.7% showed severe emotional inhibition, and 83.3% had severe failure schemas. A strong positive correlation was found between failure schemas and OCD symptoms (r = 0.697, p < 0.001). However, what truly impressed the researchers was the predictive power of the failure schema. It was the only significant predictor of OCD symptoms (Beta = 0.992, p < 0.001), explaining 55.2% of the variance.ConclusionThe study underscores the crucial influence of early maladaptive schemas on the severity of obsessive-compulsive disorder symptoms in individuals with obsessive-compulsive disorder. It proposes that considering early maladaptive schemas, such as emotional self-awareness, failure, and vulnerability to harm, can aid in gauging the severity of obsessive-compulsive disorder symptoms. Moreover, the study’s findings are of significant importance to mental health professionals, researchers, and individuals involved in the treatment and management of obsessive-compulsive disorder, as they provide a deeper understanding of the condition and suggest practical approaches for its management.

Navigating the Gap Between Correlational and Intervention Studies of Fatherhood and Children’s Development: A Family Systems Ecological Perspective

SYNOPSIS Objective. In fatherhood research, a large gap has emerged between correlation-based studies and the design of interventions to increase the quantity and quality of fathers’ involvement in their families. The correlational research suggests that all family members could benefit from fatherhood intervention designs that attempt to reduce risks and strengthen protective conditions in multiple family domains—an approach consistent with family systems theories and ecological theories of child development. But most fatherhood interventions have been designed solely for fathers and focus primarily on parenting. Even in rare instances in which both parents are included in a father-focused parenting intervention, the curriculum rarely attends to the quality of relationship between the co-parents, despite the fact that this relationship is a prime correlate and predictor of father involvement and father-child relationship quality. Design. This narrative review describes the current gap between multidimensional correlational studies of fathers and families and the restricted designs of most father involvement interventions. We describe a family systems ecological intervention approach to bringing the correlational and intervention streams of fatherhood research closer together. Results. Evidence from empirical studies of correlations between risk/protective factors and outcomes supports a family systems ecological model of five domains relevant for inclusion in fatherhood intervention curricula and measurement protocols. Evaluations of interventions based on these five domains show that when both parents participate, the interventions have greater impact than interventions directed only to fathers. Fathering is not simply behavior that occurs between a father and his child. In addition to the quality of his direct interaction with his child, fathering is a dynamic product of his well-being, the quality of the relationship between the co-parents, the transmission of behavioral patterns across generations, and the balance between outside-the-family stressors and the supports available to cope with them. Conclusions. This family systems ecological approach has implications for theory testing, future intervention research, and policy decisions about fatherhood services.

Circular economy for the management of disused tyre waste in Chongón - Guayaquil

Scrap tyres can cause a severe environmental impact on the community. To describe the contribution of the circular economy model to the management of scrap tyre waste in Chongón - Guayaquil. Quantitative, descriptive, correlational study, using a survey of 20 vulcanisers in the parish of Chongón in the city of Guayaquil. A high level of reliability was obtained with a Cronbach's alpha of 0.883, as well as a significant correlation between the variables of waste management of scrap tyres and the circular economy model, with a bilateral sig. of &lt;0.05. The disposal of scrap tyres causes severe environmental impacts in the parish of Chongón-Guayaquil, however, the application of an optimal waste management of these wastes, recycling and reusing them in the manufacture of other products, corresponds to the circular economy model, promoting economic development, sustainability and environmental protection.

Spiritual Well-Being Levels and Self-Care Agency of Patients Receiving Chemotherapy With Port Catheter: A Correlational, Descriptive Study.

This study was conducted to determine the levels of Patients' spiritual well-being (SWB) and self-care agency (SCA) of patients receiving chemotherapy with a port catheter. It was a correlational and observational study. Data were collected between December 2021 and March 2022. The sample was 88 people. Of the participants; 59.1% were women, 88.6% were married, 38.6% were primary school graduates, 47.7% were unemployed, and 51.1% had income equal to their expenses. Furthermore, 38.6% patients had breast cancer diagnosis and 52.3% did not have any chronic diseases. Both scale scores were affected by different variables and there was a positive correlation between SCA and SWB. Better SWB positively affected SCA. Patient age and duration after cancer diagnosis affected SCA and SWB. Notably, SCA and SWB levels of the patients may change with age and disease progression, and patients should also be monitored in this respect.

Exploration of primary care models and timely access to care in New Brunswick (Canada)

BackgroundThis correlative study aimed to examine how the different primary care models (physicians in solo practice, physicians in collaborative practice, physicians and nurse practitioners in collaborative practice, after-hours clinics, community centers, or emergency rooms) were associated with their capability to offer timely access to their patients. The data collected from the primary care provider’s perspective was to complete the New Brunswick Health Council results on patients’ perspective.MethodsA convenience sample of 120 primary care providers (33 physicians in solo practice, 33 physicians in collaborative practice, 27 providers in collaborative practice with nurse practitioners, 2 providers working in after-hours clinics, and 10 providers in Emergency departments) responded to an online survey about their primary care models and accessibility. We used the Statistical Package for Social Sciences software to run correlations, independent t-tests and Fisher’s exact tests to compare timely access to care between variable groups.ResultsA positive correlation was observed between patient load (or the number of patients under a primary care provider’s practice), age and years of experience. However, the patient load did not translate to more timely access to care. However, a statistically significant difference (p = 0.032) was observed when primary care providers kept appointment slots available for daily urgent requests. When a primary care provider booked all available appointment slots, only 85% of them could offer timely appointments (in 5 days or less), compared to 97% who could deliver it when appointment slots were left open in their daily schedule. The primary care model (solo vs. collaboration), the use of health technologies and the type of provider did not significantly influence timely access to care. In contrast, the primary care providers who reported teleworking (or working remotely) were less likely to offer timely access to care.ConclusionTimely access to care is not always available to patients, even those with a primary care provider. Certain organizational practices may improve access to care and should be integrated into primary care in New Brunswick and elsewhere in Canada.

Reliability and Cross-Cultural Validation of the Turkish Version of the Visual Function Classification System (VFCS) for Children with Cerebral Palsy

ABSTRACT Purpose This correlational study aimed to determine the reliability and validity of the Turkish version of the Visual Function Classification System (VFCS) for children with CP. Method Two physiotherapists and caregivers (n = 56) applied the VFCS (n = 120) two times at a 15-day interval. Physiotherapists’ classifications were compared for interrater reliability. Same physiotherapists and caregivers’ classifications’ were compared for intrarater reliability. Expanded & Revised Gross Motor Function Classification System (GMFCS E&R), Manual Ability Classification System (MACS), and Communication Function Classification System (CFCS) were used for assessing validity of the culturally adapted VFCS. Results The interrater reliability between physiotherapists was excellent (ICC = 0.974, ICC = 0.988), while interrater reliability between the first physiotherapist and caregivers was good (ICC = 0.866, ICC = 0.893). The intrarater reliability was excellent (ICC = 0.971, ICC = 0.996, ICC = 0.984). A correlation was detected between the VFCS and the GMFCS E&R, MACS, and CFCS levels (r = 0.415, p < .001, r = 0.450, p < .001, r = 0.491, p < .001). Conclusion The findings of this study demonstrate the utility, compatibility and reliability of the Turkish version of the VFCS. Trial registration number NCT05102955

Predictors of attitudes towards postgraduate education of nurses: A descriptive and correlational study.

This study was conducted to identify the determinants of the attitudes of postgraduate nurses towards postgraduate education. Postgraduate education in nursing contributes to many individual and professional gains. For this reason, nurses' attitudes towards postgraduate education are gaining importance. This descriptive and correlational study was conducted with 201 nurses continuing their postgraduate education in Türkiye between 01 December 2022 and 30 August 2023. The data were obtained online via Google Forms. The data was collected using the 'Descriptive Characteristic form' and 'Scale of Attitude towards Postgraduate Education'. Univariate and multiple linear regression analyses were used to evaluate the data. The mean age of the nurses was 28.96 ± 4.85, and most of them were continuing their master's education (65.7%). Years of the employment were negatively and the quality of postgraduate education was positively related to attitudes toward postgraduate education (p < 0.05). According to the results of the multiple linear regression analysis, the quality of the postgraduate education had a significant positive effect on attitudes towards postgraduate education (β = 0.262, p < 0.001). Years of employment and quality of education were related to attitudes towards postgraduate education. As the quality of education increases, nurses' attitudes towards postgraduate education increase positively. Different qualitative and quantitative studies need to be conducted on the attitudes of postgraduate nurses toward postgraduate education and the factors affecting them in Türkiye. Plans should be made to positively affect nurses' attitudes towards postgraduate education, and their professional and individual development should be supported.

Three‐dimensional static reservoir modelling of Kareem sandstone reservoir, Tawilla Oil Field, at the southern region of Gulf of Suez, Egypt

The Gulf of Suez, which contains Egypt's oldest oil fields, is one of North Africa's most well‐known oil regions. There are more than 80 conventional oil fields in Egypt's Gulf of Suez, some of which have reservoirs that stretch back to the Precambrian and Quaternary. In close proximity to the southern entrance of the Gulf of Suez is the Tawilla West oilfield. The oil field Tawilla West is believed to consist of rotating fault blocks that descend in a south‐west direction. The main producing reservoirs are the Miocene section reservoirs, the Belayim and Kareem sandstones. The current research is focusing on the structural elements affecting this giant field to update the field structural model using the newly processed 3D seismic survey, the acquired data from newly drilled wells and the associated different logging techniques. The seismic information quality varied from poor to fair. The quality of the interpreted stratigraphic horizons and geological faults was mainly controlled by the seismic information quality. The research used seismic attribute analyses to improve interpretation and incorporate additional features, enabling better hydrocarbon potential identification and characterization of the reservoirs. Several geological structure contour maps and cross‐sections were generated to help in delineating and understanding the reservoir's extension. Based on the detailed correlation study, we were able to detect the faults that affected the structure of the Tawilla West field in detail, define their throw amounts and directions, and identify the missed sections across the studied area. This study introduces an updated model scenario to show the differences and their effect on the field development plan and recommendations. By examining subsurface geologic structural characteristics and evaluating petrophysical data, a 3D static reservoir model was created to resolve structural settings and hydrocarbon trapping, providing detailed information on the field and identifying new opportunities for future development. The research discovered that the updated detailed 3D structural model may support the Kareem Reservoir development plans and encourage drilling, workover and dynamic operations to assign development possibilities in the correct area. According to the established model, there are at least three options in the study's attic areas that might boost oil output and oil reserves for the field while avoiding further failures.

Happy couples “see” helpful partners: Relationship quality predicts biased perceptions of partner instrumentality to one's goals

AbstractPerceiving a romantic partner as instrumental to one's goals predicts myriad desirable relationship outcomes. However, little is known about the origins of perceived partner instrumentality (PPI)—particularly about factors that may bias PPI. In two studies, we provide evidence supporting the hypothesis that relationship quality predicts biased PPI. In a dyadic correlational study (Study 1) and an imagined scenario study in which we experimentally manipulated partner instrumentality levels (Study 2), participants reporting higher relationship quality perceived their partners as more instrumental to their goals—even when controlling for depressive symptoms, and when controlling for partner‐reported (Study 1) or enacted partner (Study 2) instrumentality. Additionally, in Study 1 (but not Study 2), relationship quality attenuated a negative association between depressive symptoms and PPI. Study 2 also revealed that perceiving a partner as more instrumental predicted greater intentions to provide instrumental support to that partner in the future. These findings fill important gaps in the instrumentality and relationships literature, identifying antecedents of PPI and offering insights into how PPI may predict relationship functioning.

The Mediating Role of Self-Efficacy Between Solution-Focused Thinking Skills and Psychological Resilience Among Pharmacy Students in Turkey

ObjectiveThe objective of this study was to examine the relationships between solution-focused thinking, self-efficacy, and psychological resilience in pharmacy students and to investigate the mediating role of self-efficacy in the relationship between solution-focused thinking and psychological resilience. MethodsTo achieve the objective of this study, a cross-sectional, descriptive, correlational study was conducted. ResultsA total of 884 pharmacy students participated in the study. A total of 877 student’s questionnaires were found to be valid for analysis. This study, which, to the best of our knowledge, is the first to examine the relationship between psychological resilience, solution-focused thinking, and self-efficacy levels in pharmacy students, found that students demonstrated above-average levels of psychological resilience, solution-focused thinking, and self-efficacy. Based on the research, it was determined that self-efficacy played a mediating role in the connection between solution-focused thinking and psychological resilience among pharmacy students. ConclusionStrategies that promote psychological resilience and self-efficacy, such as solution-focused approaches to learning, self-reflection, positive refraction, and skills practice, need to be integrated at all stages of the school curriculum and their efficacy assessed. Furthermore, teachers can use solution-focused approaches to develop the students’ skills and competencies in coping with challenges. To meet the increasingly complex demands of health care systems, pharmacy students need to acquire high levels of competence and self-efficacy, and the pharmacy curriculum should be designed to aid them in achieving this.

The Impact of Epistemological Beliefs and School Climate on the Sustainability of Critical Thinking Dispositions in Middle School Students

The objective of this study is to ascertain whether school climate and students’ epistemological beliefs serve as predictors of sustainable critical thinking dispositions in middle school students. This research is designed as a correlational study. A total of 585 students from four middle schools in Çanakkale, Turkey, participated in the research. To this end, the researchers administered the Critical Thinking Disposition Scale, the Middle School Students’ Epistemological Belief Scale, and the School Climate Survey, gradually collecting the raw data. Following the collection of the data, they were subjected to analysis using multiple linear regression. The results of the statistical analysis demonstrated that the students’ critical thinking dispositions were significantly predicted by both epistemological beliefs and school climate. In other words, belief in the omniscient power of authority and quick learning were found to have a negative correlation with critical thinking, whereas belief in simple knowledge was observed to have an inverse positive relationship. The dimension of the school climate, relating to positive student–teacher relations, appeared to constitute a prospective positive predictor, while authoritarian student–teacher relations and the lack of resources were identified as the main negative classroom environment factors. The study highlights the complex mutual influence of individual beliefs and the learning environment in the development of critical thinking dispositions.

Attitude toward vital signs monitoring and its predictors among clinical nurses in Saudi Arabia.

Positive attitudes toward assessing vital signs are essential in ensuring quality assessments and recognizing patients' declining conditions. However, few studies have been conducted that examine the attitudes of nurses toward this fundamental nursing skill. This research investigated the predictors of clinical nurses' attitudes toward vital signs monitoring in identifying the patients' deteriorating state. A cross-sectional, correlational study was conducted in two hospitals in Saudi Arabia. A sample of 427 clinical nurses was surveyed from February 2023 and April 2023 using a questionnaire on attitudes toward vital signs monitoring. The subscale "key indicators" achieved the highest mean, followed by "workload," "communication," and "knowledge." The hospital where the nurses work (Hospitals 1 and 2), younger age, gender (being male), marital status (being single), clinical area (working in intensive care unit), number of handled patients per shift (handling 11-20 and > 20 patients), and longer years of experience were identified as significant predictors of the nurses' positive attitude toward vital signs monitoring. This research provides valuable knowledge on which aspect of the attitudes toward vital signs monitoring necessitates educational enhancement among clinical nurses. The factors influencing the clinical nurses' attitude toward vital signs monitoring reported in this study may be useful for nurse managers and other hospital policymakers in developing focused continuing educational interventions targeting enhanced vital signs monitoring competencies.

Density-Density Correlation Spectra of Ultracold Bosonic Gas Released from a Deep 1D Optical Lattice.

Density-density correlation analysis is a convenient diagnostic tool to reveal the hidden order in the strongly correlated phases of ultracold atoms. We report on a study of the density-density correlations of ultracold bosonic atoms which were initially prepared in a Mott insulator (MI) state in one-dimensional optical lattices. For the atomic gases released from the deep optical lattice, we extracted the normalized density-density correlation function from the atomic density distributions of freely expanded atomic clouds. Periodic bunching peaks were observed in the density-density correlation spectra, as in the case of higher-dimensional lattices. Treating the bosonic gas within each lattice well as a subcondensate without quantum tunneling, we simulated the post-expansion density distribution along the direction of the 1D lattice, and the calculated density-density correlation spectra agreed with our experimental observations.