Reliability and factorial validity of a Farsi version of the 20-item Toronto Alexithymia Scale with a sample of Iranian students

This study investigated the psychometric properties of the Farsi version of the 20-item Toronto Alexithymia Scale for 587 undergraduate students (349 women and 238 men) at the University of Tehran. All participants were asked to complete the Farsi version of the TAS-20, the Emotional Intelligence Scale, and the Mental Health Inventory. Findings supported the internal consistency, test-retest reliability, concurrent validity, and three-factor structure of the Farsi version of the 20-item Toronto Alexithymia Scale. The factors found in the Farsi version of this scale are similar to the three factors found previously and were accordingly labeled as Difficulty Identifying Feelings, Difficulty Describing Feelings, and Externally Oriented Thinking. The results provide evidence for applicability of the TAS-20 and its cross-cultural validity.     

Activation of midbrain structures by associative novelty and the formation of explicit memory in humans

Recent evidence suggests a close functional relationship between memory formation in the hippocampus and dopaminergic neuromodulation originating in the ventral tegmental area and medial substantia nigra of the midbrain. Here we report midbrain activation in two functional MRI studies of visual memory in healthy young adults. In the first study, participants distinguished between familiar and novel configurations of pairs of items which had been studied together by either learning the location or the identity of the items. In the second study, participants studied words by either rating the words' pleasantness or counting syllables. The ventral tegmental area and medial substantia nigra showed increased activation by associative novelty (first study) and subsequent free recall performance (second study). In both studies, this activation accompanied hippocampal activation, but was unaffected by the study task. Thus midbrain regions seem to participate selectively in hippocampus-dependent processes of associative novelty and explicit memory formation, but appear to be unaffected by other task-relevant aspects.     

Irrational beliefs in major depression and generalized anxiety disorders in an Iranian sample: a preliminary study

Previous research on Rational Emotive Theory using western samples has shown that irrational belief systems are associated with emotional disorders such as anxiety and depression. In a replication of this work the present study was conducted to compare the scores of 29 clinically depressed, 31 clinically anxious, and 34 normal controls on the Irrational Beliefs Test in an Iranian sample. Consistent with Ellis's theory, depressed and anxious patients scored higher than the controls on scores for the full scale and all 10 subscales of the Irrational Beliefs Test. Also, the two patient groups differed significantly in their endorsement of 2 out of 10 irrational belief subscales but not in overall score on irrational beliefs. Results were interpreted in light of previous literature.     

Effects of religion and type of religious internalization on the mental health of Iranian adolescents

This study was designed to assess the effects of religion and two types of religious internalization on the mental health of Iranian adolescents. High school students (82 Moslem and 37 Christian) were selected randomly from four high schools in Shiraz and completed the Religious Self-regulation Questionnaire and the General Health Questionnaire. Analysis showed that main effects of types of religious internalization measured on four subscales of the General Health Questionnaire were significant. Religion was significantly associated only with somatic symptoms. For other scales no main effects of religion, types of religious internalization, or their interactions were significant.     

Factor structure of the Depression Self-Rating Scale in an Iranian adolescent sample

Previous research showed concurrent validity for the Depression Self-rating Scale for Iranian adolescents, so the present purpose was to evaluate construct validity. The scale was distributed to 2012 school students in Grades 5 to 10. Factor analysis using varimax rotation yielded four factors interpretable as depressed mood, hopelessness, lack of pleasurable activities, and physiological symptoms. These factors accounted for 44% of the variance and provide some support for construct validity of the scale in Iranian adolescents.     

Perceived locus of control as a function of parental physical punishment among a group of Iranian children

A comparison of scores on locus of control by two groups of children, 89 who had experienced parental physical punishment and 174 who had not experienced parental physical punishment, showed that children with experience of physical punishment scored significantly more external than children who had not experienced physical punishment. The results are discussed in relation to previous studies, and some educational implications noted.     

Orientation-selective adaptation to crowded illusory lines

Visual adaptation has been successfully used as a psychophysical tool for studying the functional organisation of visual awareness. It has been shown that orientation-selective adaptation to a grating pattern occurs in crowded conditions. In such conditions, simultaneous presentation of flanking distractors pushes the target stimulus out of conscious perception and severely impairs orientation discrimination in the periphery of the visual field. In the present study, orientation-selective adaptation to illusory lines induced by two line gratings abutting each other with a phase shift was examined in crowded and non-crowded conditions. To rule out the effects of lower level adaptations we used an animation paradigm in which the orientations of the two line gratings were altered repeatedly during adaptation phase without any change in the orientation of the resulting illusory line. Although performance of subjects in reporting the orientation of crowded illusory lines was at chance level, orientation-selective adaptation was preserved for crowded as well as non-crowded adapting targets. Two control experiments demonstrated that adaptation to endpoints of real lines at the location of abutting grating lines had minimal effect on the adaptation to illusory lines; and changes in the configuration of endpoints could not be responsible for better performance when adapting and test stimuli were different. We conclude that a crowding effect occurs after illusory lines have been processed in the visual stream. Since illusory lines seem to be represented at relatively early stages of visual processing (e.g. area V2), adaptation to crowded illusory stimuli suggests that neuronal activation in those early stages is not necessarily correlated with conscious perception.     

Locus of control of children experiencing separation and divorce in their families in Iran

A comparison of scores on locus of control by three groups of children in intact families (n=676), parent loss through death (n=30), and parent loss through divorce (n = 20) showed that children from divorced families scored significantly more external than children from intact families. The results are considered in relation to previous studies and some educational implications noted.     

Attentional bias for words and faces in social anxiety

Conflicting findings concerning the nature and presence of attentional bias in social anxiety and social phobia have been reported in the literature. This paper reports the findings of two studies comparing people with high and low social anxiety on dot probe tasks using words, faces photographed in front view, and faces photographed in profile as stimuli. In Study 1 those with high social anxiety displayed an attentional bias towards negative faces. The low social anxiety group showed an attentional bias towards positive faces. No significant effects were observed on the dot probe using words as stimuli. Study 2 used pairs of faces presented in profile as though looking at each other. One of the faces displayed either a positive, negative or neutral expression. The second face always had a neutral expression, and in half of the trials it was the subject's own face. The findings of this more ecologically valid procedure replicated those of Study 1. Facilitated attention to dots following emotional faces was specific to threatening facial stimuli. From these studies it appears that the facial dot probe task is a more sensitive index of attentional bias than the word task in a non-clinical sample with social anxiety.