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Biomedical subjects

M W MacGregor

Publications and source records attributed to M W MacGregor.

4 recordsLinked to original sources
PubMed2000

Constructive anger verbal behavior predicts blood pressure in a population-based sample.

The creation of an observational Constructive Anger Behavior-Verbal Style Scale (CAB-V) and its relation to resting blood pressure (BP) in an age- and sex-stratified, population-based sample is examined. Participants (N = 1,862) provided hypertension risk factor information, had resting BP assessed multiple times, and completed a videotaped interview, which was later coded for CAB-V and Hostile Style. High CAB-V scores remained a significant predictor of lower resting BP when controlling for the effects of standard hypertension risk factors (age, sex, body mass index, physical activity, alcohol use, smoking status, parental myocardial infarction history, education, and diabetic status) and psychosocial measures (anxiety, depression, hostility, social support, and Hostile Style). This relation also remained when excluding known hypertensive persons. Results suggest that constructive anger expression may have an independent beneficial association with resting BP.

Adolescent↗
PubMed1996

Coder gender and potential for hostility ratings.

This study examined the effects of coder gender on Potential for Hostility ratings. Six trained coders (3 men and 3 women) who were unaware of the coder gender effect hypothesis coded 30 male and 30 female undergraduates for Potential for Hostility. Although reliability estimates as calculated by Cronbach's alpha suggested that all coders were consistent, an analysis of variance revealed a significant main effect for coder gender, wherein female coders rated participants as displaying significantly less Potential for Hostility than did male coders. This significant difference was also meaningful, as coder gender accounted for 32% of the variance in Potential for Hostility scores. Thus, future Potential for Hostility investigations need to consider the gender of those coding, as this factor both significantly and substantially influences reported Potential for Hostility ratings.

Adult↗
PubMed1996

Reliability of an idiographic Q-sort measure of defense mechanisms.

Despite the important insights the concept of defense mechanisms may offer to our understanding of human behavior, no standardized definitions of defense mechanisms have been universally accepted. Inconsistencies in the definition and conceptualization of defense mechanisms has limited the practical utility of research involving these constructs. In addition, lack of interrater reliability, use of anecdotal evidence, and reliance on self-reports has retarded their investigation. Conducting methodologically rigorous investigations with a psychometrically sound instrument is the first step in addressing some of the issues concerning defense mechanisms and their theoretical postulates. This study was conducted to determine the reliability associated with the Defense-Q, an observer-based Q-sort measure of defense mechanisms. Thirty participants who had undergone an interpersonally stressful interview (the Type A Structured Interview; Rosenman, 1978) were rated by 11 trained coders, both for their use of the 25 defense mechanisms and for their ego strength. Reliability was assessed using Cronbach's alpha. Individual defense mechanisms demonstrated reliability ranging from .28 (undoing) to .92 (humor), with an average reliability of .73. Coder reliability ranged from .63 to .76, with an average of .69. These results indicate that defense mechanisms can be reliably assessed by the Defense-Q. Reliability of the Defense-Q is compared to existing observational measures of defense mechanisms.

Journal Article↗