Toshinori Kitamura

Text messaging: Are dependency and Excessive Use discretely different for Japanese university students?

Text messaging may be excessive and young people may be dependent on it. We distributed the Self-perception of Text-message Dependency Scale (STDS), Hospital Anxiety and Depression Scale (HADS), Temperament and Character Inventory (TCI), and Relationship Questionnaire (RQ) to 223 Japanese university students in a two-wave study, separated by a 5-month interval. The STDS yielded a three-factor structure. The STDS scores across the two measurement occasions were stable across time (except for the Relationship Maintenance subscale). A hierarchical cluster analysis suggested a three-class structure interpreted as Normal Users, Excessive Users, and Dependent Users. Excessive Users and Dependent Users were characterized by a young age at initial mobile phone use, more frequent use of text messaging, higher Novelty Seeking, and better Other-Model patterns of adult attachment. Unlike Excessive Users, Dependent Users were characterized by lower Self-directedness, poorer Self-Model of adult attachment, and higher anxiety and depression. The Excessive Users, but not the Dependent Users, were characterized by high Reward Dependence and Co-operativeness. The present study demonstrated that the STDS has a robust factor structure, good construct validity, and temporal stability (except for Relationship Maintenance subscale); students could be classified into normal, excessive, and Dependent Users of the text messaging; and Dependent Users were characterized by Excessive Use and personality immaturity.

Effects of Temperament and Character Profiles on State and Trait Depression and Anxiety: A Prospective Study of a Japanese Youth Population

Objective. To examine the effects of temperament and character profiles on state and trait depression and anxiety in a Japanese youth population. Method. Japanese university students were solicited for participation in a two-wave study, with assessments performed at Time 1 (T1) and Time 2 (T2), separated by a five-month interval. A total of 184 students completed the Japanese version of the temperament and character inventory (TCI) at T1 and the Hospital Anxiety and Depression Scale (HADS) at T1 and T2. We posited two latent variables, trait depression and anxiety, composed of the T1 and T2 HADS depression and anxiety scores, respectively. We also posited that temperament domain traits would predict character domain traits, and that all the personality traits would be linked to trait depression and anxiety and also predict T2 depression and anxiety. Results. Structural regression modeling showed that (1) only high Novelty Seeking predicted T2 Anxiety score, (2) trait depression and anxiety were linked to high harm avoidance and low self-directedness, and (3) trait depression was linked to high self-transcendence whereas trait anxiety was linked to low reward dependence, persistence, and cooperativeness. Conclusion. The characteristic associations between TCI subscales and depression and anxiety were limited to the trait rather than state aspects of depression and anxiety.

Do people cope with situations as they say? Relationship between perceived coping style and actual coping response.

The coping style that individuals think they will use when encountering stressful situations may differ from actual coping response in real situations.

Temperament, Character, and Depressive Symptoms during Pregnancy: A Study of a Japanese Population

Background. To examine the effects of temperament and character domains on depression during pregnancy. Methods. We examined 601 pregnant women using a questionnaire that included the Edinburgh Postnatal Depression Scale (EPDS), the Temperament and Character Inventory (TCI), and demographic variables. Results. In a hierarchical regression analysis, severity of depression during pregnancy was predicted by the womens negative response towards the current pregnancy, low self-directedness, and high harm avoidance, persistence, and self-transcendence. Conclusion. Depression during pregnancy is predicted by personality traits as well as womens negative attitudes towards the current pregnancy.

The Effects of Temperament and Character on Symptoms of Depression in a Chinese Nonclinical Population

Objective. To examine the relations between personality traits and syndromes of depression in a nonclinical Chinese population. Method. We recruited 469 nonclinical participants in China. They completed the Chinese version temperament and character inventory (TCI) and self-rating depression scale (SDS). A structural equation model was used to rate the relation between seven TCI scales and the three SDS subscale scores (based on Shafers meta-analysis of the SDS items factor analyses). This was based on the assumption that the three depression subscales would be predicted by the temperament and character subscales, whereas the character subscales would be predicted by the temperament subscales. Results. The positive symptoms scores were predicted by low self-directedness (SD), cooperativeness (C), reward dependence (RD), and persistence (P) as well as older age. The negative symptoms scores were predicted only by an older age. The somatic symptoms scores were predicted by high SD. Conclusion. Syndromes of depression are differentially associated with temperament and character patterns. It was mainly the positive symptoms scores that were predicted by the TCI scores. The effects of harm avoidance (HA) on the positive symptoms scores could be mediated by low SD and C.

The effects of symptoms, diagnostic labels, and education in psychiatry on the stigmatization towards schizophrenia: a questionnaire survey among a lay population in Japan

This questionnaire survey was conducted to study the determinants of stigmatization toward schizophrenia in Japan. A total of 1003 persons living in Kumamoto Prefecture (mean age 25.5; SD=14.1) participated in this study through convenience sampling. They read one of four case vignettes about a person with mental illness and answered questions about their attitudes toward the case. Vignettes varied in terms of descriptions of symptoms (schizophrenia vs. depression) and presentation of the diagnostic label of schizophrenia (yes or no). A path analysis was performed to examine the effects of symptoms, diagnostic label, experience of education in psychiatry, and demographic features on stigmatizing attitudes. Results showed that schizophrenic symptoms, diagnostic label of schizophrenia, and experience of education in psychiatry were significantly associated with stigmatization toward the case. Interaction terms of these variables did not show significant association with stigmatization. These results highlight the importance of optimizing education techniques about mental illness so as to avoid cultivating stigmatizing attitudes toward schizophrenia.

Temperament and Character Domains of Personality and Depression

Depression Research and Treatment has issued a second compendium of papers focused on temperament, character, and depression. The psychobiology theory of personality proposed by Cloninger is a currently prevailing theory of personality that has been extensively investigated in the context of many different types of mental and personality disorders. This special issue reports up-to-date research findings on the psychobiology theory and depression from different countries. The current issue consists of six reports. Miettunen and colleagues in Finland present findings from a longitudinal birth cohort study (N = 4941). Participants with depression at 31 years of followup had higher rates of harm avoidance (HA) than participants without any psychiatric disorders. Participants without any psychiatric history were followed for another 12 years. Those who subsequently developed depression had high HA in 1997. The authors hypothesize that high HA is a potential indicator for subsequent depression. This study only used temperament scales and thus no information was available on the association between character and depression. Students in senior high schools (N = 1234) who were invited to participate in an internet-based intervention program for depression were studied by Christian and colleagues in Norway. High HA and low self-directedness (SD) emerged as strong predictors of adolescent depression. Interestingly, use of the internet intervention program was associated with low reward dependence (RD) in addition to depression severity. Garcia and colleagues studied an adolescent population (N = 304) in Sweden. Based on positive affect (PA) and negative affect (NA) scores derived from the Positive Affect and Negative Affect Schedule, the participants were categorized into four groups: self-fulfilling (high PA and low NA), high affective (high PA and high NA), low affective (low PA and low NA), and self-destructive (low PA and high NA). The self-fulfilling group was characterized by higher persistence (PS), SD, and cooperativeness (CO) than the three other groups. The self-destructive group was characterized by high HA and RD. The authors claim character maturity (expressed as high SD and CO) is important for psychological well-being. In Japan, Lu and colleagues followed graduate students (N = 184) on two occasions separated by a five-month interval. In a structural regression model, they posited that trait anxiety and depression constructs were linked to high HA and low SD. Although trait anxiety and depression scores were moderately correlated with each other, these two constructs showed different associations with Temperament and Character Inventory (TCI) subscale scores. Thus, trait depression was linked to high self-transcendence (ST) whereas trait anxiety was linked to low RD, PS, and CO. The authors claim that character maturity is linked to trait rather than state aspects of depression and anxiety. Directly exposed survivors of the Oklahoma City bombing randomly selected from a bombing survivor registry (N = 151) were examined by North and colleagues in the USA. Posttraumatic stress disorder (PTSD) after the bombing was associated with low SD and CO together with high ST and HA. Postdisaster major depression (MD) was more prevalent among those with PTSD than those without it, but low SD and CO could not be predicted by post-disaster MD. The authors emphasized the importance of developing and validating measures of resilience. A unique measure of temperament, the Temperament Evaluation of Memphis, Pisa, Paris, and San Diego (TEMPS), was used by Tei-Tominaga and colleagues to study job stress among employees in one Japanese company (N = 728). Depression was predicted by high levels of cyclothymic and anxious temperament traits even after controlling for the effects of work-related stressors such as demanding work conditions and overcommitment. These articles all indicate the importance of temperament and character traits in the development of depression among a variety of populations across different countries. Despite some differences between the studies, a common theme may be that low SD and high HA are predictors of depression either directly or being mediated by third variables. Toshinori Kitamura C. Robert Cloninger Andrea Fossati Jorg Richter

Disagreement between parents on the assessment of child's temperament traits

Accuracy of temperament assessment is a prerequisite in research studies. To identify the extent to which parental assessment of child temperament is biased by their personal attributes, we proposed a new structural equation model, in which biases of parental attributes in their assessment of child temperament can be separated from the true (i.e. non‐biased) associations between the two.

Disagreement between parents on assessment of child temperament traits

Accuracy of temperament assessment is a prerequisite in research studies. To identify the extent to which parental assessment of child temperament is biased by their personal attributes, we proposed a new structural equation model, in which biases of parental attributes in their assessment of child temperament can be separated from the true (i.e. non‐biased) associations between the two.