Peter K.H. Chew

Statistics Anxiety Update Refining the Construct and Recommendations for a New Research Agenda

Appreciation of the importance of statistics literacy for citizens of a democracy has resulted in an increasing number of degree programs making statistics courses mandatory for university students. Unfortunately, empirical evidence suggests that students in nonmathematical disciplines (e.g., social sciences) regard statistics courses as the most anxiety-inducing course in their degree programs. Although a literature review exists for statistics anxiety, it was done more than a decade ago, and newer studies have since added findings for consideration. In this article, we provide a current review of the statistics anxiety literature. Specifically, related variables, definitions, and measures of statistics anxiety are reviewed with the goal of refining the statistics anxiety construct. Antecedents, effects, and interventions of statistics anxiety are also reviewed to provide recommendations for statistics instructors and for a new research agenda.

What predicts medical lethality of suicide attempts in Asian youths

This study explores youth suicide attempts in Singapore using multiple databases of comprehensive archival records. Three years of medical records related to suicide attempters (N=666) who were admitted to the emergency department of a large teaching hospital in Singapore were subjected to retrospective analysis. Compared to other age groups, a peak in suicide attempts (n=207) was observed in youths aged between 15 and 24 years old (76.3% females; 23.7% males, mean age=19.30, SD=2.89). The model using recognized risk and protective factors was significant in predicting medical lethality, and correctly classified 62.8% of high lethality cases. Only resolution of precipitant made a unique statistical significant contribution. Analysis was separately conducted for males and females. Implications of the findings are discussed.

Does ethnicity matter in risk and protective factors for suicide attempts and suicide lethality

This study explored ethnic differences in risk and protective factors for suicide attempts, for the major ethnic groups in Singapore, and ethnic differences in prediction of lethality. Three years of medical records related to suicide attempters (N = 666) who were admitted to the emergency department of a large teaching hospital in Singapore were subjected to analysis. Of the sample, 69.2% were female, 30.8% male; 63.8% Chinese, 15.8% Indian, and 15.0% Malay. Indians were over-represented in this sample, as compared with the ethnic distribution in the general population. Ages ranged from 10 to 85 years old (M = 29.7, SD = 16.1). Ethnic differences were found in risk and protective factors, and perceived lethality of suicide attempts. All available variables were subjected to regression analyses for Chinese, Indian and Malay attempters to arrive at parsimonious models for prediction of perceived lethality. The findings were discussed in regards to implications in assessment of suicide risk and primary prevention for the multiethnic society in Singapore.

Effect of Cardiac Rehabilitation on Quality of Life, Depression and Anxiety in Asian Patients

This study explored the effect of cardiac rehabilitation on quality of life, depression, and anxiety in Asian patients in Singapore. Out of the 194 patients who were recruited into the study, 139 patients (71.6%) completed both the pre- and post-cardiac rehabilitation questionnaires. Their ages ranged from 28 to 80 (M = 56.66, SD = 8.88), and 103 patients (74.1%) were males and 21 patients (15.1%) were females. As hypothesized, there was a statistically significant difference between the pre- and post-cardiac rehabilitation scores on the combined dependent variables, F (4, 135) = 34.84, p < 0.001; Wilks’ Lambda = 0.49; partial eta squared = 0.51. An inspection of the mean scores indicated that patients reported higher levels of physical and mental quality of life and lower levels of depression post-cardiac rehabilitation. The findings were discussed in regards to implications in cardiac rehabilitation in Singapore.

Prediction of quality of life in Asian patients with schizophrenia: a cross-sectional pilot study

Background There has been a shift in mental health services from an emphasis on treatment focused on reducing symptoms to a more holistic approach involving quality of life (QOL) and overall well-being. Many psychosocial variables are associated with QOL but a parsimonious framework is needed to deepen our understanding about the contribution of psychosocial factors in influencing the QOL of Asian patients with schizophrenia in Singapore. The study aimed to address the current gap in literature by analysis of QOL using available predictors in Asian patients with schizophrenia in Singapore. Methods 43 Singaporean patients diagnosed with schizophrenia were recruited at a large teaching hospital in Singapore from January to May 2010 and were invited to complete questionnaires. Of the sample, 65.1% were females, ages ranged from 18 to 65 (M = 44.60, SD = 12.19). Available variables were subjected to regression analysis. Findings The data were analyzed using SPSS Version 23 with the alpha level set at 0.05. The final model with five predictors was significant in predicting QOL. Positive Re-appraisal, Social Support, Avoidant Coping, Duration of Hospitalization, and Education accounted for 47.2% of the variance (Adjusted R2 = 40.0%) in QOL, F (5, 37) = 6.60, p < 0.001. Those with post-secondary or higher education had higher QOL than those with secondary or lower education. Duration of hospitalization negatively predicted QOL. Conclusion The findings were discussed in regards to clinical implications for informing interventions to enhance QOL in patients with schizophrenia.

Suicide Precipitants Differ Across the Lifespan but Are Not Significant in Predicting Medically Severe Attempts

An important risk factor for suicide assessment is the suicide precipitant. This study explores suicide attempt precipitants across the lifespan. Three years of medical records related to suicide attempters who were admitted to the emergency department of a large teaching hospital in Singapore were subjected to analysis. These cases were divided into three age groups: Adolescence, Early Adulthood, and Middle Adulthood. A total of 540 cases were examined (70.9% females; 63.7% Chinese, 13.7% Malays, 15.9% Indians), whose ages ranged from 12 to 62. There were eight cases above the age of 65 years which were excluded from the analysis. Significant differences were found in precipitants for suicide attempts across the lifespan. Middle adults had relatively fewer relationship problems, and adolescents had comparatively fewer financial and medical problems. The models to predict medically severe attempts across the age groups using suicide precipitants were not significant. The findings were discussed in regards to implications in suicide assessment and primary prevention in Singapore, as well as limitations and recommendations for future research.

An examination of the internal consistency and structure of the Statistical Anxiety Rating Scale (STARS)

The purpose of the current study was to examine the internal consistency and structure of the English version of the Statistical Anxiety Rating Scale (STARS). Participants were 202 (79% females) psychology undergraduates was recruited from James Cook University’s Singapore (71%) and Australia (29%) campuses. Acceptable internal consistency reliabilities, ranging from .81 to .94, were found in this sample. Approximate fit indices suggest that a correlated six first-order factor model best describes the data in contrast to theoretical considerations suggesting that a six factor model with two correlated superordinate factors (i.e., statistics anxiety and attitudes toward statistics) best describes the data. Researchers are recommended to use part one of the STARS to assess statistics anxiety and part two to assess attitudes toward statistics.

Racism in Singapore: a review and recommendations for future research

Racism refers to ‘the differential treatment enacted by an individual, group, or organization on individuals based on assumptions of a groups phenotypic, linguistic, or cultural differences’ (Gamst, Liang, & Der-Karabetian, 2011, p. 251). Currently, there is a lack of psychological research investigating racism in Singapore. The available research, narrative reviews, qualitative studies, and quantitative studies have yielded limited and inconclusive results. These researches are critically evaluated to provide four recommendations for a psychological research agenda: (a) develop a reliable and valid instrument to assess racism, (b) conduct experimental research to examine racism perpetuated by the majority or institutions, (c) examine the negative effects of racism, and (d) develop and evaluate interventions for racism.

Psychometric properties of the Statistical Anxiety Scale among students in Singapore and Australia

The purpose of the current study was to examine the reliability and validity of the Statistical Anxiety Scale (SAS) among a sample of Singapore and Australia psychology undergraduates. Participants were 163 undergraduates (78.5% female) in the James Cook University Psychology programs at the Australia (33.1 %) and Singapore (66.9%) campuses. Acceptable internal consistency reliabilities, ranging from 0.89 to 0.95 for the factors and for the total scale of the SAS, were found in the current study. Exploratory factor analysis identified a three-factor structure, with the same eight items on each factor as identified by the authors of the scale. The results provided support for the use of the SAS among Singapore and Australia psychology undergraduates. Limitations include the exploratory nature of the study and non-generalizabilty of the results.