Language, Learning, and Color Perception

Abstract— People perceive colors categorically. But what is the role of the environment (or nurture)—specifically, language—in color perception? The effects of language on the way people categorize and perceive colors have been considered to be minimal, but recent evidence suggests that language may indeed change color perception. Speakers of languages with different color-name repertoires show differences in the way they perceive color. Research shows that categorical effects on color perception can be induced through laboratory training and suggests language can similarly change color perception through the mechanism of perceptual learning.     

Neurobiological Markers of Illness Onset in Psychosis and Schizophrenia: The Search for a Moving Target

In this review, we describe neuropsychological and brain imaging findings in the early stages of psychosis and schizophrenia. We focus on recent clinical high-risk studies and consider whether the evidence supports these as ‘endophenotypes’ of a vulnerability to the illness or as ‘biomarkers’ of illness onset and transition. The findings suggest that there are a number of processes at psychosis onset that may represent biomarkers of incipient illness. These neurobiological indices particularly implicate the integrity of frontal and temporal cortices, which may or may not be related to the genetics of psychosis (i.e. potential ‘endophenotypes’). However, these brain regions are dynamically changing during normal maturation, meaning that any putative neurobiological markers identified at the earliest stages of illness may be relatively unstable. We suggest that, while such measures may be readily identified as potential neurobiological markers of established illness, they are inconsistent at (or around) the time of illness onset when assessed cross-sectionally. Instead, identification of more valid risk markers may require longitudinal assessment to ascertain normal or abnormal trajectories of neurodevelopment. Accordingly, we assert that the current conceptualisations of potential biomarkers and/or ‘endophenotypes’ for schizophrenia may need to be reconsidered in the context of normal and abnormal brain maturational processes at the time of onset of psychotic disorders.     

Neural and behavioral effects of interference resolution in depression and rumination

Individuals diagnosed with major depressive disorder (MDD) often ruminate about their depression and their life situations, impairing their concentration and performance on daily tasks. We examined whether rumination might be due to a deficit in the ability to expel negative information from short-term memory (STM), and fMRI was used to examine the neural structures involved in this ability. MDD and healthy control (HC) participants were tested using a directed-forgetting procedure in a short-term item recognition task. As predicted, MDD participants had more difficulty than did HCs in expelling negative, but not positive, words from STM. Overall, the neural networks involved in directed forgetting were similar for both groups, but the MDDs exhibited more spatial variability in activation in the left inferior frontal gyrus (a region critical for inhibiting irrelevant information), which may contribute to their relative inability to inhibit negative information.     

Which personality traits are associated with cognitions related to problematic Internet use?

The effects of the Big Five personality traits on cognitions regarding problematic Internet use (PIU) have not been studied. The present paper aims to evaluate the effects of personality traits on cognitions regarding PIU that are classified as loneliness/depression, diminished impulse control, distraction and social control. Additionally, the mediator effect of the Big Five personality traits on the relationship between time spent online and cognitions regarding PIU was tested in a sample of 494 Turkish university students. Hierarchical regression analysis results reveal that controlling the effects of socio‐demographic variables and time spent online, higher neuroticism and lower conscientiousness were related to cognitions regarding PIU. Moreover, results of structural equation modelling indicate that the relationship between time spent online and cognitions regarding PIU was independently mediated by extraversion, openness and agreeableness. Examining the role of all of the Big Five personality traits (especially neuroticism and conscientiousness) on PIU will increase understanding in further studies.     

Psychological aspects of orthognathic surgery

Abstract

With the dramatic growth in the number of adults undergoing orthodontics to correct malocclusion, and those undergoing surgical orthodontics or orthognathic surgery to correct skeletal discrepancies in the orofacial region, it is important to examine the psychological characteristics of these patients before and after treatment is completed. This paper serves as a general review and summarizes the findings of two major longitudinal studies of patients seeking surgical correction and compares them with people who underwent conventional orthodontics, those who rejected any treatment, and those who sought cosmetic surgery. Both studies revealed that most women seeking surgical orthodontics focused on aesthetic improvement as a motive, whereas men sought to improve their appearance and mastication. Women were also more likely to report problems with the temporomandibular joint as a motive. Men and women scored similarly on a measure of body image, although women reported lower facial image presurgically and higher postsurgically than did men. The greatest gains following surgery were in facial and profile image for both men and women. Orthodontic patients showed less improvement, while those rejecting treatment experienced a decline in body image. Many functional improvements did not occur until 24 months postoperatively; lingering paraesthesia was described by 49% of the sample. Emotional reactions included anxiety preoperatively, and depression postoperatively, especially among patients scoring high on neuroticism and those experiencing other major life events. These studies reveal that people seeking surgical orthodontics are within the normal range of most personality measures and experience greater gains psychologically than do conventional orthodontic patients.     

Effects of low survivability cues and participant sex on physiological and behavioral responses to sexual stimuli

According to life history theory, environmental cues indicating that one's future survivability is low increase reproductive effort. This suggests that exposure to low survivability cues will increase people's preparedness to engage in sex. However, according to sexual selection theory and parental investment theory, evolutionary pressures favored a more conservative sexual strategy among women compared to men. We therefore hypothesized that men, but not women, would respond to low survivability cues with increased sexual preparedness. Accordingly, both subliminal and supraliminal death primes (as compared with control primes) led men, but not women, to exhibit increased physiological arousal in response to sexual images (Study 1), and stronger approach-oriented behavioral responses to sexual images (Study 2). Theoretical implications for life history theory are discussed.     

Turkish validation of the Emotional Approach Coping Scale

The Emotional Approach Coping Scale is frequently used to assess coping, which consists of emotional processing and emotional expression. The present aim was to examine the psychometric properties of this scale by utilizing two independent samples: university students (n = 481) and community members (n = 284). Based on goodness-of-fit indices in confirmatory factor analysis, a two-factor model yielded significant findings in these samples. The results of multi-group analysis revealed that the theoretical structure of the dispositional Emotional Approach Coping Scale was the same for men and women. In addition to sufficient internal consistency and test-retest reliability, the relationships between the Emotional Approach Coping Scale and five conceptually related measures (coping styles, positive affect, negative affect, depression, and trait anxiety) demonstrated concurrent validity. Furthermore, the present study provides a map of emotional approach coping styles in a non-Western culture.     

The nature of learned categorical perception effects: a psychophysical approach

Categorical perception is often cited as a striking example of cognitive influences on perception. However, some evidence suggests the term is a misnomer, with effects based on cognitive not perceptual processing. Here, using a psychophysical approach, we provide evidence consistent with a learned categorical perception effect that is dependent on analysis within the visual processing stream. An improvement in participants' discrimination between grating patterns that they had learned to place in different categories was 'tuned' around the orientation of the patterns experienced during category learning. Thus, here, categorical perception may result from attentionally modulated perceptual learning about diagnostic category features, based upon orientation-selective stages of analysis. This argues strongly that category learning can alter our perception of the world.     

Moving Toward a Secure Attachment Style: Can Repeated Security Priming Help?

Despite the abundant literature on attachment processes and the development of a secure or insecure attachment orientation during childhood, it is still unclear whether adult attachment style can be changed through systematic interventions, and if so how the change process works. One way to learn more about such change is to create it, on a small scale, in the laboratory. It is already known that a person's sense of security can be momentarily changed in the laboratory ( Mikulincer & Shaver, 2007a ). But there is clearly a difference between very short‐term and longer‐term change. According to Bowlby (1982) , the development of an attachment orientation in childhood is based on many encounters and interactions with caregivers, which gradually create a mental network of relatively stable expectations and concerns. Thus, it may take many episodes of security priming in a laboratory to begin to affect a young adult's attachment style in a lasting way. Here, we explore this possibility, review existing evidence from our own and other researchers’ laboratories, and discuss directions for future research.