Junichi Takahashi

Junichi Takahashi
Fukushima University · Faculty of Human Development and Culture

Ph.D.

About

37
Publications
15,232
Reads
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157
Citations
Citations since 2016
14 Research Items
128 Citations
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025
Additional affiliations
April 2013 - March 2014
National Center of Neurology and Psychiatry
Position
  • PostDoc Position

Publications

Publications (37)
Preprint
Aphantasia is a characteristic in which people with normal perception have difficulty constructing their imagination. Most previous studies have used the Vividness of Visual Imagery Questionnaire (VVIQ), with some using self-identification of the absence of visual imagery, but there is a discrepancy between the proportions of aphantasia in the popu...
Preprint
Aphantasia is a characteristic in which people with normal perception have difficulty constructing their imagination. Most previous studies have used the Vividness of Visual Imagery Questionnaire (VVIQ), with some using self-identification of the absence of visual imagery, but there is a discrepancy between the proportions of aphantasia in the popu...
Article
Full-text available
We reviewed the properties of mental imagery in aphantasia—a condition whereby individuals have difficulties in forming mental imagery, even though their visual perception is intact. Individuals with aphantasia have demonstrated lower priming effects regarding visual imagery in a binocular rivalry paradigm; however, these individuals could still co...
Article
Full-text available
Aphantasia is a condition firstly proposed by Zeman in which people show blind imagination despite no assumption of clinical factors. However, in Japan, there have been almost no reports of aphantasia. The present study reports a Japanese single-case of aphantasia, focusing on behavioral imagery abilities. Our case (KI), who realized his blind ima...
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We examined the effects of evaluative and affective components of attitudes on interactions with people with physical disabilities. Participants (N = 81) completed a questionnaire measuring self-efficacy regarding interactions with people with physical disabilities; we used a semantic differential (SD) method to measure impressions of people with p...
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We examined the influence of expansion and contraction on visual short-term memory (VSTM) using a change-detection task. In each trial, several expanding/contracting line segments with various orientations were presented in two successive displays. The orientation of objects in the second display was either identical to, or different from, that of...
Article
Background: The neural correlates of executive function disorders are thought to be predominantly localized within the prefrontal cortex (PFC). However, no study to date has investigated changes in this system across different age groups in children with attention deficit hyperactivity disorder (ADHD). Thus, this study aimed to explore changes in...
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Our study aimed to examine the effects of pattern complexity on visual short-term memory (VSTM) at the retrieval stage in typical developing adults with different autism spectrum quotient (AQ) scores. Participants underwent electroencephalography during a same-different task, in which they judged as rapidly and accurately as possible whether the ta...
Article
Objective: To establish valid, objective biomarkers for ADHD using machine learning. Method: Machine learning was used to predict disorder severity from new brain function data, using a support vector machine (SVM). A multicenter approach was used to collect data for machine learning training, including behavioral and physiological indicators, a...
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We examined the effects of intervention on child-care styles in parents who have a preschool children with developmental disorders. In an intervention (5-sessions), parents (n = 9) watched free play-classroom classroom scenes and participated in a free writing exercise praising their child in the scenes. They were given instruction as they watched...
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We examined impressions towards people with disabilities by using a semantic differential (SD) method. Participants (N = 105, 40 men and 65 women) rated video scenes featuring a person with intellectual and developmental disabilities, on 20 adjective-pair scales, for 10 minutes. In addition, they completed questionnaire, investigating degree of rec...
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We examined teachers' attitudes formation toward the inclusive education system in Japan using a questionnaire method. A total of 145 teachers from special (77 teachers) and normal schools (68 teachers) rated the Japanese version of the scale for measuring teachers' perception on inclusion, SACIE-R (Sentiments, Attitudes, and Concerns about Inclusi...
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We examined the effects of visual preference for configurations of objects on visual short-term memory (VSTM) of spatial locations (Experiment 1) and object features (Experiment 2) using a same-different (Experiment 1) and a change-detection (Experiment 2) task. In Experiment 1, participants judged whether the locations of five, seven, and nine dot...
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We examined dysfunctional memory processing of facial expressions in relation to alexithymia. Individuals with high and low alexithymia, as measured by the Toronto Alexithymia Scale (TAS-20), participated in a visual search task (Experiment 1A) and a change-detection task (Experiments 1B and 2), to assess differences in their visual short-term memo...
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The current study used video clips of bowing actions depicted by three-dimensional computer graphics. The bend angle (15 degrees and 45 degrees) and duration of the bent posture (0-4.5 seconds) were varied. In the first experiment, the participants rated their subjective impressions of the bowing actions. The bowing actions that were made at a 45 d...
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The study examined viewpoint-dependent and viewpoint-independent visual cognitive processes in children of normal intelligence (mean age = 9.8 years) who have difficulty in Japanese Kanji writing. We used a mental rotation task in which the stimuli consisted of two ice-cream cones with three differently colored scoops of ice cream. Children were as...
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We examined the effects of negative (anger, sadness, and disgust) and positive (happiness) stimuli on face recognition. We adopted the flicker paradigm composed of change-detection (Experiment A) and memory (Experiment B) tasks. In the change-detection task, each trial cycled through two displays separated by a blank display until a response was ma...
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We examined the effects of complexity on the efficiency of pattern encoding in the general population differing on autism-spectrum quotient (AQ) scores. We compared brain activity (electroencephalography) during a same-different task for High and Low AQ groups. The task was composed of identical comparison and categorical comparison (CC) conditions...
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We examined the effects of self-regulation of slow cortical potentials (SCP) in nine children with attention-deficit/hyperactivity disorder (ADHD) by focusing on the changes in electroencephalographic (EEG) shifts during SCP sessions. In SCP training, individuals learn to increase and decrease their cortical excitabilities (enhancement of negative...
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In the present study, we examined the relationship between adult attachment style, with regard to the four-category model, and social skills among Japanese university students. Participants (N = 212, 110 men and 102 women) completed questionnaires on both attachment style and social skills. Correlation analyses showed significant negative correlati...
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This report examines effects of the spatial complexity of configurations on visual short-term memory (VSTM) capacity for individuals from the general population differing on autism-spectrum quotient (AQ) scores. During each trial, nine-line segments with various orientations were arrayed in simple or complex configurations and presented in both mem...
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Children with low birth weight are defined as having a birth weight of less than 2,500 g. Due to improvements of medical technology, survival rates of LBW newborns are rising. Since some LBW children show visuomotor disabilities, these children need special educational support. Although researchers and parents understand the importance of appropria...
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Pattern redundancy is a key concept for representing the amount of internal mental load (encoding efficiency) needed for pattern perception/recognition. The present study investigated how pattern redundancy influences encoding and memory processes in the visual system using a rapid serial visual presentation (RSVP) paradigm. With RSVP, it is well k...
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Inclusive education, based on the principle that all children (including those with disabilities) should receive similar education, has been recently adopted in primary and secondary schools throughout several countries. Within an inclusive education context, teachers are faced with the challenge of developing their knowledge and skills necessary t...
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We investigated the relationships between Autism-spectrum Quotient (AQ) scores, adult attachment style (as assessed by the Internal Working Model [IWM] scale) scores, and social skills (as assessed by Kiku-chi's Scale of Social Skills [KiSS-18]) in university students who had no diagnosis of autism spectrum disorder (N = 468). The AQ consists of fi...
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A previous behavioral study showed that a group of individuals with high vividness of visual imagery (High group), as determined from the score for the Vividness of Visual Imagery Questionnaire (VVIQ), could perceive the apparent motion path more strongly than a group of individuals with low vividness of visual imagery (Low group). To examine the p...
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The effect on the capacity of visual working memory of spatial complexity (as defined by Garner's principle) in rotation and reflection transformation was examined in persons differing along the Autism Spectrum Quotient (AQ), using a change-detection task. On each trial, nine line segments were arrayed in simple, medium, and complex configurations,...
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The purpose of the current study was to examine the relationships between vividness of visual imagery and apparent motion. To simulate apparent motion, three dots separated in space were alternately turned on and off at various inter-stimulus intervals (ISIs). Ninety-nine participants, divided into two groups (high vividness and low vividness) base...
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Previous studies on pattern recognition have shown that pattern goodness is highly correlated to physically-related variables such as the redundancy of visual patterns. However, it may be difficult to define various affective responses such as preference, pleasure and beauty on the basis of just physically-related variables. Therefore, we need to i...
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It has been indicated that visual search is interfered with in spatial working memory (WM), although not in nonspatial WM. In this study, the effects on visual search of individual differences in spatial and nonspatial WM were examined. Two visual search conditions were used: a conjunction search condition comprising two features (color and shape)...
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We investigated the effects of non-native language (English) exposure on event-related potentials (ERPs) in first- and second-year (four- and five-year-old) preschool Japanese native speakers while they listened to semantically congruent and incongruent Japanese sentences. The children were divided into a non-native language exposed group (exposed...
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Full-text available
We used event-related potentials (ERPs) to investigate the effects of non-native language (English) exposure in first-, second-, and third-year (4- to 6-year-old) preschool Japanese native children while they listened to semantically congruent and incongruent Japanese sentences. Our previous study (Takahashi et al., in press) showed that difference...

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Projects

Projects (2)
Project
The aim of this project is to reveal the perceptual/cognitive properties of individuals with developmental disorders in terms of Gestalt law (e.g., goodness, complexity, and symmetry).
Project
The aim of this project is to examine attitudes towards people with disabilities.