Imagery Ability Research Articles

Effects of motor imagery training on service performance in novice tennis players: the role of imagery ability

ABSTRACT The aim of this study was to examine how imagery ability could affect service improvement, following pre-performance motor imagery (MI) intervention, in young novice tennis players. Participants were divided into 3 groups with regard to their MI ability scores (Poor imager, Good imager and Control groups) obtained on the Movement Imagery Questionnaire for Children. During a pre-test, participants performed 10 services. The pre-performance MI practice was included during physical practice for 24 sessions. Each session consisted of 20 services, which were first imagined and then physically performed. Participants of the Poor and Good imager groups were required to use external visual MI, while those of the control group were given a countdown task. Participants performed an intermediate-test, after a first block of 12 practice sessions, and a post-test one-week after the last block of practice session, which were identical to the pre-test. The results of this study showed that MI improved service performance (i.e., percentage of success, speed and efficiency), and that this improvement was faster in the Good imager than in the Poor imager group. More specifically, The Poor imager group required more MI interventions to achieve equivalent performance to Good imager group. The impact of MI practice on service performance, for novice tennis players, is discussed.

Relationship between Corticospinal Excitability While Gazing at the Mirror and Motor Imagery Ability

Mirror therapy (MT) helps stroke survivors recover motor function. Previous studies have reported that an individual's motor imagery ability is related to the areas of brain activity during motor imagery and the effectiveness of motor imagery training. However, the relationship between MT and motor imagery ability and between corticospinal tract excitability during mirror gazing, an important component of MT, and motor imagery ability is unclear. This study determined whether the motor-evoked potential (MEP) amplitude while gazing at the mirror relates to participants' motor imagery abilities. Twenty-four healthy right-handed adults (seven males) were recruited. Transcranial magnetic stimulation was performed while gazing at the mirror, and MEP of the first dorsal interosseous muscle of the right hand were measured. Motor imagery ability was measured using the Kinesthetic and Visual Imagery Questionnaire (KVIQ), which assesses the vividness of motor imagery ability. Additionally, a mental chronometry (MC) task was used to assess time aspects. The results showed a significant moderate correlation between changes in MEP amplitude values while gazing at the mirror, as compared with resting conditions, and assessment scores of KVIQ. This study shows that corticospinal excitability because of mirror gazing may be related to the vividness of motor imagery ability.

Developing imagery ability in esport athletes using layered stimulus response training

Abstract For esport athletes to effectively use imagery and experience its many benefits, they must develop a collection of skills referred to as imagery ability. Layered stimulus response training (LSRT) is an evidence-based technique informed by bioinformational theory to improve how easily someone can form rich and vivid images that more closely approximate the real-life situation. In turn, having a better ability to generate and control clear and vivid images is associated with better performance and optimal mental and emotional states. The aim of this paper is to explain how sport psychologists can guide esport athletes through cycles of LSRT, which involves imaging, evaluating, reflecting, and then developing images in progressive layers of different stimulus, response, and meaning propositions. Aids to image generation and other variations of LSRT as well as future research opportunities for applying LSRT to esport are also discussed.

Effects of neurofeedback training combined with transcranial direct current stimulation on motor imagery: A randomized controlled trial.

Neurofeedback (NFB) training and transcranial direct current stimulation (tDCS) have been shown to individually improve motor imagery (MI) abilities. However, the effect of combining both of them with MI has not been verified. Therefore, the aim of this study was to examine the effect of applying tDCS directly before MI with NFB. Participants were divided into an NFB group (n = 10) that performed MI with NFB and an NFB + tDCS group (n = 10) that received tDCS for 10 min before MI with NFB. Both groups performed 60 MI trials with NFB. The MI task was performed 20 times without NFB before and after training, and μ-event-related desynchronization (ERD) and vividness MI were evaluated. μ-ERD increased significantly in the NFB + tDCS group compared to the NFB group. MI vividness significantly increased before and after training. Transcranial direct current stimulation and NFB modulate different processes with respect to MI ability improvement; hence, their combination might further improve MI performance. The results of this study indicate that the combination of NFB and tDCS for MI is more effective in improving MI abilities than applying them individually.

Is it really empathy? The potentially confounding role of mental imagery in self-reports of empathy

Empathy refers to an individual’s responses to the experiences of others. We hypothesised that mental imagery is related to self-reported empathy if assessed with verbal empathy questionnaires or vignettes and that this association disappears when visual tests are used. In study 1, we examined the association between imagery vividness and empathy in a large-scale sample (N = 2,232) using the Vividness of Visual Imagery Questionnaire and the Interpersonal Reactivity Index. In study 2, we used an experimental extreme group approach, contrasting the responses of participants with aphantasia (=imagery-absence) (N = 112) and controls (N = 120) to pictorial and parallelised verbal scenarios. Both studies confirmed that mental imagery ability is positively associated with empathy when verbal material is used but not when visual material is used.

Sonification of Motor Imagery in the Basketball Jump Shot: Effect on Muscle Activity Amplitude

The purpose of this research was to study the effect of AudioVisual pattern on the muscle activity amplitude during mental imagery. For this purpose, 25 female students (20.73 ± 1.56 years old) engaged in mental imagery (internal, external, and kinesthetic) in three conditions: No pattern, Visual pattern, and AudioVisual pattern. The angular velocity of the elbow joint in the basketball jump shot skill was sonified and presented to the subjects as an auditory pattern. The results showed that the muscle activity amplitude in AudioVisual–kinesthetic and AudioVisual–internal (and not external) conditions is higher than for other conditions. Additionally, a positive correlation was observed between Visual–kinesthetic imagery ability and muscle activity amplitude in the AudioVisual pattern condition and in kinesthetic and internal imagery. In addition, the muscle activity amplitude of high and low Visual–kinesthetic imagery ability conditions were only different in the AudioVisual pattern. The superiority of the AudioVisual condition is most likely due to the auditory information presented in this research being closely related to the kinesthetic sense of movement.

A Comprehensive Analysis: Sports Imagery Ability Of State Level Badminton Players From North-Eastern State India

A Comprehensive Analysis: Sports Imagery Ability Of State Level Badminton Players From North-Eastern State India

Mental Paper Folding Revisited: The Involvement of Visual Action Imagery

Action imagery describes a mental representation of an action and its consequences. Although it is widely recognized that people differ in their ability to imagine actions, objective validated tests to measure such differences are scarce. In search of an objective testing method for action imagery ability, the present study investigated whether solving mental paper-folding tasks involves action imagery. The stimuli were two-dimensional grids of six squares. A total of 99 participants mentally folded each grid into a three-dimensional cube to judge whether two highlighted lines in the grid overlapped in the imagined cube. This was done in two sessions of 214 judgements each, where the grids differed in overlaps, the least number of imagined folds, and the least number of imagined directional changes. Error rates and reaction times increased with the number of imagined folds and with the number of directional changes. Furthermore, more errors were committed with overlapping lines than with no overlaps. This was not reflected in the reaction times. Hence, the reaction times increased when the stepwise folding process was enlarged, but not when the final selection was more difficult. We concluded that the participants predominantly used action imagery as a task-solving strategy rather than for abstract problem-solving.

The Effect of Imagery Ability on Mental Toughness and Sportive Confidence Level in Athletes

The aim of this study was to determine the effect of the imagery abilities of the athletes on their mental toughness and sportive confidence levels. 627 individual and team sports athletes that were active sports and licensed participated in the study in the Eastern Anatolia region of Turkey. In the study, the sports imagery scale developed by Hall et al., (1998) adapted to Turkish by Kızıldağ (2007) was used with the aim of determining the types of imagery of athletes, Mental toughness scale in sports developed by Sheard et al. (2009) adapted to Turkish by Altıntaş and Koruç (2016) was used to determine the level of mental toughness in the sports events and Sportive continuous self-confidence scale developed by Vealey (1986) and adapted to Turkish by Yıldırım (2013) was used to determine athletes' sportive confidence. In collecting data, face to face survey method was preferred. The Pearson Correlation and Linear Regression analysis were used in the analysis of the data obtained through the SPSS package program. According to the results of the analysis, it was found that there were significant relationships between the imagery ability in athletes and the lower dimensions of mental toughness and sportive confidence. According to this result, it was shown that the ability of imagery in athletes is an important factor in their mental toughness and sportive confidence levels.

Motor imagery training of goal-directed reaching in relation to imagery of reaching and grasping in healthy people

The study aimed to determine whether four weeks of motor imagery training (MIT) of goal-directed reaching (reaching to grasp task) would affect the cortical activity during motor imagery of reaching (MIR) and grasping (MIG) in the same way. We examined cortical activity regarding event-related potentials (ERPs) in healthy young participants. Our study also evaluated the subjective vividness of the imagery. Furthermore, we aimed to determine the relationship between the subjective assessment of motor imagery (MI) ability to reach and grasp and the cortical activity during those tasks before and after training to understand the underlying neuroplasticity mechanisms. Twenty-seven volunteers participated in MIT of goal-directed reaching and two measurement sessions before and after MIT. During the sessions 128-channel electroencephalography (EEG) was recorded during MIR and MIG. Also, participants assessed the vividness of the MI tasks using a visual analog scale (VAS). The vividness of imagination improved significantly (P < .05) after MIT. A repeated measures ANOVA showed that the task (MIR/MIG) and the location of electrodes had a significant effect on the ERP's amplitude (P < .05). The interaction between the task, location, and session (before/after MIT) also had a significant effect on the ERP's amplitude (P < .05). Finally, the location of electrodes and the interaction between location and session had a significant effect on the ERP's latency (P < .05). We found that MIT influenced the EEG signal associated with reaching differently than grasping. The effect was more pronounced for MIR than for MIG. Correlation analysis showed that changes in the assessed parameters due to MIT reduced the relationship between the subjective evaluation of imagining and the EEG signal. This finding means that the subjective evaluation of imagining cannot be a simple, functional insight into the bioelectrical activity of the cerebral cortex expressed by the ERPs in mental training. The changes we noted in ERPs after MIT may benefit the use of non-invasive EEG in the brain-computer interface (BCI) context.Trial registration: NCT04048083.

Psychometric Support for a Japanese Version of the Sport Imagery Ability Questionnaire.

In this two-part study, we addressed psychometric properties of the Japanese version of the Sport Imagery Ability Questionnaire (SIAQ-J). We analyzed the SIAQ-J factor structure, assessed gender, competitive level, sport type and years of experience differences on the SIAQ-J, and we investigated whether the SIAQ-J was predicted by goal clarity. In Study 1, we translated the original SIAQ (15 items) into Japanese and performed an exploratory factor analysis (n = 366). In Study 2 (n = 422), we verified the measurement model established in Study 1 with exploratory factor analysis (EFA). Study 1 found five exploratory factors-skill, strategy, goal, affect and mastery imagery-and these were confirmed through the confirmatory factor analysis (CFA) conducted in Study 2. Structural equation modelling supported a model wherein goal clarity positively predicted all SIAQ-J subscales. This study provided additional validation of the original SIAQ. Overall, the SIAQ-J demonstrated good factorial validity, temporal reliability and gender invariance and discriminated among athletes of different competitive levels and years of experience.

Transcranial direct current stimulation alters sensorimotor modulation during cognitive representation of movement.

We recently demonstrated, by means of short latency afferent inhibition (SAI), that before an imagined movement, during the reaction time (RT), SAI decreases only in the movement-related muscle (sensorimotor modulation) and that a correlation exists between sensorimotor modulation and motor imagery (MI) ability. Excitatory anodal transcranial direct current stimulation (a-tDCS) on M1 could enhance the MI outcome; however, mechanisms of action are not completely known. Here, we assessed if a-tDCS on M1 prior to an MI task could affect sensorimotor modulation. Participants imagined abducting the index or little finger in response to an acoustic signal. SAI was evaluated from the first dorsal interosseus after the “go” signal, before the expected electromyographic (EMG) activity. Participants received 20-min 1.5 mA a-tDCS or sham-tDCS on M1 on two different days, in random order. Results showed that a-tDCS on M1 increases the sensorimotor modulation consisting of a weakening of SAI after the Go signal with respect to sham-tDCS, in the movement-related muscle right before the beginning of MI. These results suggest that a-tDCS on M1 further potentiate those circuits responsible for sensorimotor modulation in the RT phase of MI. Increased sensorimotor modulation during MI may be one of the mechanisms involved in MI improvement after a-tDCS over M1.

Olfactory metacognition and memory in individuals with different subjective odor imagery abilities

Imagery vividness is one of the key indicators to evaluate the ability to generate mental images. There is large inter-individual variability in olfactory imagery (OI) abilities, however, little is known about the underlying factors for individual OI abilities. Using a word cueing imagery paradigm and the trial-by-trial imagery vividness rating method, participants with high or low OI abilities (differentiated by the Vividness of Olfactory Imagery Questionnaire) completed two OI tasks with either shorter (2 s) or longer (8 s) image generation time. Participants’ olfactory function, olfactory-related working memory and episodic recognition memory were measured using validated methods. Moreover, olfactory metacognition was assessed using the Odor Awareness Scale (OAS) and the Importance of Olfaction Questionnaire (IOQ). Compared to participants with high OI abilities, those with low OI abilities reported less vivid odor images during OI tasks. For participants with low OI abilities, the imagery vividness significantly improved as the image generation time increased. There was no difference regarding olfactory perception or olfactory-related memory performances between the high and the low OI ability groups. However, participants with higher OI abilities had significant higher scores on the OAS and the IOQ, indicating a superior olfactory-related metacognition. These results provide evidences supporting the underlying factors that related to variances of subjective ability of generating vivid odor mental images.

Neural Activity During Imagery Supports Three Imagery Abilities as Measured by the Movement Imagery Questionnaire-3.

Self-report and neural data were examined in 14 right-handed college-age males screened from a pool of 200 to verify neural activity during imagery and that the neural activity (area of brain) varies as a function of the imagery type. Functional magnetic resonance imaging data collected during real-time imagery of the three Movement Imagery Questionnaire-3 abilities indicated frontal areas, motor areas, and cerebellum active during kinesthetic imagery, motor areas, and superior parietal lobule during internal visual imagery, and parietal lobule and occipital cortex during external visual imagery. Central and imagery-specific neural patterns were found providing further biological validation of kinesthetic, internal visual, and external visual complementing results on females. Next, research should (a)compare neural activity between male participants screened by self-reported imagery abilities to determine if good imagers have more efficient neural networks than poor imagers and (b)determine if there is a statistical link between participants' neural activity during imagery and self-report Movement Imagery Questionnaire-3 scores.

Effects of Gender and Age on Self-reported Odor Imagery Ability

Effects of Gender and Age on Self-reported Odor Imagery Ability

Effects of Imagery Training on Imagery Ability and Performance

Effects of Imagery Training on Imagery Ability and Performance

A Real-world Examination of Progressive Imagery Delivery in Competitive Basketball

Effective delivery of imagery training has been studied for some time. Recently, researchers have determined that, in some contexts, Progressive Imagery (PI), in which content is added to the imagery script in phases, can be more effective than Routine Imagery (RI), in which all the imagery content is presented in every session of an imagery program. However, most research to date consists of field studies, lacking ecological validity. We examined the efficacy of a PI program presented to highly-skilled basketball players in league competition across a whole season, using a Single-Case Design (SCD). Participants were five male players from Division 1 of the State Basketball League, who were pre-tested on the Sport Imagery Ability Measure (SIAM) to ensure they had at least moderate imagery ability. We monitored their Free-Throw Shooting (FTS) percentage in every league match of the whole season. The first 4 to 6 matches (Phase A) gave a stable baseline. Phase B, again lasting 4 to 6 matches, involved imagery that focused on static aspects of FTS movements. In Phase C (4 to 6 matches), more complex elements of FTS were added to imagery, including teammates and opponents on court. Phase D, lasting at least 4 matches, introduced imagery of a high-pressure context in which the FTS shot would decide the match. At the end of the season, each participant was interviewed about his experiences with imagery. We employed visual analysis and the split-middle technique to measure performance and self-efficacy. On these measures, all participants improved their FTS from baseline to Phase D, although two performed best in Phase C. Participants reported feeling comfortable with the changing phases, although one commented that he would have preferred the high-pressure imagery earlier, before he faced real high-pressure finals. We concluded that PI was an effective intervention among highly-skilled participants over a full competition season, while timing of high-pressure imagery should be tested prior to crucial season-ending matches.

Questioning the transfer effect of motor imagery benefits: The neglected variable of interest

Over the last three decades, a large amount of experimental research aimed at determining the optimal motor imagery practice guidelines, and provided a comprehensive overview of the main recommendations to develop effective interventions. Yet, the scientific literature paid little attention to transfer effects resulting from motor imagery practice. In the present paper, we examined whether performance gains following motor imagery were task-specific or likely to be transferred to partially distinct motor skills. Twenty-eight golf players of intermediate level were involved in a 12-weeks test-retest design, where swing and putting performances were measured. All participants were subjected to three 4-week imagery interventions (internal visual imagery, external visual imagery and kinesthetic imagery), which were contrasted to a control pre-test measure. During each imagery intervention, they were requested to imagine only the swing shot. All imagery interventions contributed to enhance swing performance, and gains largely transferred to the putting performance in spite of a complete absence of training. A slight superiority of external visual imagery was observed for both shots. Interestingly, individual motor imagery ability scores predicted performance gains under the corresponding motor imagery training condition. Taken together, present findings support transfer effects of motor imagery interventions. Practically, this effect should be considered to achieve optimally effective interventions to enhance performance in relation to individual motor imagery ability profiles.

Imagery-related eye movements in 3D space depend on individual differences in visual object imagery

During recall of visual information people tend to move their eyes even though there is nothing to see. Previous studies indicated that such eye movements are related to the spatial location of previously seen items on 2D screens, but they also showed that eye movement behavior varies significantly across individuals. The reason for these differences remains unclear. In the present study we used immersive virtual reality to investigate how individual tendencies to process and represent visual information contribute to eye fixation patterns in visual imagery of previously inspected objects in three-dimensional (3D) space. We show that participants also look back to relevant locations when they are free to move in 3D space. Furthermore, we found that looking back to relevant locations depends on individual differences in visual object imagery abilities. We suggest that object visualizers rely less on spatial information because they tend to process and represent the visual information in terms of color and shape rather than in terms of spatial layout. This finding indicates that eye movements during imagery are subject to individual strategies, and the immersive setting in 3D space made individual differences more likely to unfold.

Mental skills in Serbian handball players: In relation to the position and gender of players.

ObjectivesDespite the potential link between mental skills and athletic performance, little is done to examine handball players’ present level of mental skills concerning their performance. To begin with, the study has three folded aims; the first one is to examine the factor structure of Bull’s Mental Skills Questionnaire, which was developed in the United Kingdom to measure selected mental skill, of Serbian athlete population. The second aim is to determine gender differences in those mental skills, and the third aim is to determine differences between the playing positions in the mental skills of handball players to create a mental profile of Serbian handball players.Materials and methodsThe sample consisted of 170 handball players, aged 14 to 39, who have played handball at the semi-elite, competitive-elite, and successful-elite level. The modified exploratory factor analysis was used to determine the latent dimensions of the Bull’s Mental Skills Questionnaire. For examining gender differences in the manifestation of mental skills Mann–Whitney U test was used.ResultsCompared to the original structure of the questionnaire, which singles out seven factors of mental skills (imagery ability, mental preparation, self-confidence, anxiety and worry management, concentration ability, relaxation ability, and motivation), five factors were singled out in the sample of Serbian male and female handball players (anxiety and concentration management—α = 0.74; self-confidence—α = 0.75; relaxation ability—α = 0.66; mental preparation—α = 0.68, and imagery ability—α = 0.66). With these five subscales as dependent variables, results of the Mann–Whitney U test show that there are significant gender differences in variable anxiety and concentration management (U = 2893.5, p = 0.049) and relaxation ability (U = 2833.0, p = 0.031). Female handball players score higher on anxiety and concentration management and lower on relaxation ability. When playing positions are in question, results of Kruskal–Wallis‘s one-way analysis of variance, i.e., Mann–Whitney’s post hoc analysis, suggest that statistically significant differences were observed between wings and center backs and wings and goalkeepers in the imagery ability.ConclusionThe Bull’s Mental Skills Questionnaire in Serbian sample of handball players show satisfactory psychometric characteristics but has singled out five factors of mental skills compared to the original questionnaire.