The cortisol awakening response: Associations with trait anxiety and stress reactivity

This study investigated the extent to which trait anxiety and state anxiety in response to stress are associated with the cortisol awakening response (CAR).Fifty-one healthy participants were recruited. State anxiety measures were taken in anticipation of and during a laboratory stressor. Salivary cortisol levels were measured immediately upon awakening (at 0, 15, 30, and 45 min) on two consecutive mornings. Cortisol awakening response was assessed by the area under the curve with respect to zero (AUC_G).The magnitude of the CAR was found to be negatively associated with both trait anxiety and anticipatory anxiety. Moreover, regression analysis showed that the effects of trait anxiety on the AUC_G were mediated by anticipatory anxiety.These results suggest that the CAR is influenced by trait anxiety. Moreover, the effect of trait anxiety on the CAR seems to operate by impacting on psychological stress reactivity (i.e., anticipatory anxiety).     

Recombinative generalization of subword units using matching to sample

The purpose of the current study was to develop and test a computerized matching-to-sample (MTS) protocol to facilitate recombinative generalization of subword units (onsets and rimes) and recognition of novel onset-rime and onset-rime-rime words. In addition, we sought to isolate the key training components necessary for recombinative generalization. Twenty-five literate adults participated. Conditional discrimination training emerged as a crucial training component. These findings support the effectiveness of MTS in facilitating recombinative generalization, particularly when conditional discrimination training with subword units is used.     

The many faces of stereotype threat: Group- and self-threat

Contending with negative intellectual stereotypes has been shown to depress the academic performance of targets of the stereotypes [Steele, C. M. (1997). A threat in the air: How stereotypes shape intellectual identity and performance. American Psychologist, 52, 613-629]. The present paper examines whether women’s mathematics performance is differentially affected by the concern of confirming that a negative stereotype is true of the self (self-threat), than by the concern of confirming that the stereotype is true of their gender (group-threat). In two studies we independently manipulated these different threats for women taking a mathematics test. Gender identification moderated the effect of group-threats on test performance; only women highly identified with their gender underperformed. The performance of less gender-identified women was unaffected by group-threats. In contrast, gender identification did not moderate the effect of self-threats—both high- and low-identified women underperformed. The results of these studies suggest that women’s math performance is differentially affected by the source of the threat.     

The Near-Death Experience: An Integration of Cultural, Spiritual, and Physical Perspectives

The near-death experience (NDE) has been studied extensively from two conflicting perspectives: that the NDE is a glimpse into an after-death state and that it is the result of a dying brain. Of late a third perspective has emerged, that of NDEs being culturally determined. I propose an integrated model in which all three perspectives are viewed with equal weight.     

Basic Personality Inventory clinical and validity scales: Stability and internal consistency

A sample of 71 incarcerated adult male inmates was used to investigate the stability and internal consistency for the clinical and validity scales of the Basic Personality Inventoiy. One month test-retest stability coefficients for the clinical scales ranged from .53 to .77. KR-20 reliabilities ranged from .61 to .86 on each occasion. With the exception of the longer perseveration scales, stability was also reasonable for the validity scales. Overall, the Basic Personality Inventory clinical and validity scales demonstrated favorable stability and reliability in an inmate population.This research was supported by a STEP grant from the Alberta Government. Portions of this paper were presented at the Psychologists Association of Alberta's annual meeting, April 8, 1989, Calgary, Alberta. We gratefully acknowledge M. R. Sass and M. Wcinrath for their support.     

Brain stimulation as a reinforcer: intermittent schedules

Rats with chronically implanted, bipolar electrodes in the septal and medial forebrain bundle areas, in addition to the region of the mammillary bodies of the posterior hypothalamus, were trained to press a permanently mounted lever in order to produce a second, retractable lever. Rewarding brain stimulation was programmed on the retractable lever; following completion of the programmed number of CRF response-stimulations, that lever was retracted from the box. Responding on the permanent lever could reintroduce the retractable lever. Fixed interval, fixed ratio, DRL, and variable interval schedules were programmed on the permanent lever in the range of schedule parameters often used with conventional reinforcers. Typical effects are described, and it is concluded that there are no striking differences between brain-stimulation reinforcement and the conventional reinforcers.