Memory on the beach: an Australian memory (and hypnosis) laboratory

The memory (and hypnosis) lab at the University of New South Wales investigates a broad range of memory topics. We try to find innovative methods from cognitive and clinical psychology to address theoretical and empirical questions about memory. We aso use hypnosis as one major methodological tool in our investigations of memory (as well as other cognitive processes). In this paper, we review the projects currently underway in our memory (and hypnosis) lab.     

The driving anger expression inventory: a measure of how people express their anger on the road

Four ways people express their anger when driving were identified. Verbal Aggressive Expression (alpha=0.88) assesses verbally aggressive expression of anger (e.g., yelling or cursing at another driver); Personal Physical Aggressive Expression (alpha=0.81), the ways the person uses him/herself to express anger (e.g., trying to get out and tell off or have a physical fight with another driver); Use of the Vehicle to Express Anger (alpha=0.86), the ways the person uses his/her vehicle to express anger (e.g., flashing lights at or cutting another driver off in anger); and Adaptive/Constructive Expression (alpha=0.90), the ways the person copes positively with anger (e.g., focuses on safe driving or tries to relax). Aggressive forms can be summed into Total Aggressive Expression Index (alpha=0.90). Aggressive forms of expression correlated positively with each other (rs=0.39-0.48), but were uncorrelated or correlated negatively with adaptive/constructive expression (rs=-0.02 to -0.22). Aggressive forms of anger expression correlated positively with driving-related anger, aggression, and risky behavior; adaptive/constructive expression tended to correlate negatively with these variables. Differences in the strengths of correlations and regression analyses supported discriminant and incremental validity and suggested forms of anger expression contributed differentially to understanding driving-related behaviors. Theoretical and treatment implications were explored.     

Categorical perception of familiar objects

We report three experiments where the categorical perception of familiar, three-dimensional objects was investigated. A continuum of shape change between 15 pairs of objects was created and the images along the continuum were used as stimuli. In Experiment 1 participants were first required to discriminate pairs of images of objects that lay along the shape continuum. Then participants were asked to classify each morph-image into one of two pre-specified classes. We found evidence for categorical perception in some but not all of our object pairs. In Experiment 2 we varied the viewpoint of the objects in the discrimination task and found that effects of categorical perception generalized across changes in view. In Experiment 3 similarity ratings for each object pair were collected. These similarity scores correlated with the degree of perceptual categorization found for the object pairs. Our findings suggest that some familiar objects are perceived categorically and that categorical perception is closely tied to inter-object perceptual similarity.     

The subjects as a simple random effect fallacy: subject variability and morphological family effects in the mental lexicon

This is a methodological study addressing the appropriateness of standard by-subject and by-item averaging procedures for the analysis of repeated-measures designs. By means of a reanalysis of published data (Schreuder & Baayen, 1997), using random regression models, we present a proof of existence of systematic variability between participants that is ignored in the standard psycholinguistic analytical procedures. By applying linear mixed effects modeling (Pinheiro & Bates, 2000), we call attention to the potential lack of power of the by-subject and by-item analyses, which in this case study fail to reveal the coexistence of a facilitatory family size effect and an inhibitory family frequency effect in visual and auditory lexical processing.     

Childhood abuse as a risk factor for suicidal behavior in borderline personality disorder

A childhood history of sexual or physical abuse is highly prevalent in borderline personality disorder (BPD) and is associated with self-destructive behavior in clinical and nonclinical samples. Viewing BPD as a "high risk" disorder, we asked if childhood abuse was a risk factor for adult suicidal behavior or if it was related to other known risk factors for suicide in BPD. A semistructured Abuse History was obtained in 61 criteria-defined BPD patients, who were characterized by structured interviews and self-reports for Axis I disorders, Suicide History, BPD severity, hopelessness, impulsivity, impulsive-aggression, and antisocial traits. Occurrence and severity of childhood sexual abuse, but not physical abuse, predicted adult suicidal behavior independent of other known risk factors. The odds of a sexually abused patient attempting suicide in adulthood was over 10 times that of a patient who was never sexually abused. Given a history of childhood sexual abuse, the risk of adult suicidal behavior in BPD was increased by antisocial traits, severity of BPD, hopelessness, or comorbid major depressive episode (MDE).     

Subjective overachievement: individual differences in self-doubt and concern with performance

We discuss the construct of doubt about one's competence and suggest that doubt can have myriad consequences (e.g., self-handicapping, defensive pessimism). We focus on the effect of self-doubt when it is combined with a concern with performance and assert that this combination leads to the phenomenon of subjective overachievement. In two studies, we present a new 17-item Subjective Overachievement Scale (SOS), which includes two independent subscales measuring individual differences in self-doubt and concern with performance. The first study, consisting of two large samples (Ns = 2,311 and 1,703), provides evidence that the scale has high internal consistency and a clear two-factor structure. Additionally, the subscales have adequate test-retest reliability (Ns = 67 and 115). A second study reveals that the SOS has good convergent and discriminant validity. Both subscales are unrelated to social desirability but exhibit the predicted patterns of associations with other related constructs. The Concern with Performance Subscale is correlated with achievement motivation, whereas the Self-Doubt Subscale is correlated with scales assessing negative affectivity (e.g., self-esteem, social anxiety) and other self-related strategies associated with concerns about one's competence (e.g., self-handicapping, defensive pessimism, impostor phenomenon). The SOS, which combines the two subscales, appears to tap a unique strategy that individuals may use to deal with doubts about their own competence.     

Recent life events, social adjustment, and suicide attempts in patients with major depression and borderline personality disorder

This study investigated the impact of recent life events and social adjustment on suicide attempter status in 34 patients with major depression, 24 patients with borderline personality disorder, and 22 patients with co-morbid major depression and borderline personality disorder. Suicide attempters reported more recent life events and scored lower on a measure of social adjustment in their families and overall social adjustment, compared with non-attempters. Borderline disordered and borderline or depressed patients were more likely to have attempted suicide than patients with major depression only. Recent life events did not predict attempter status. Lower social adjustment in the immediate family and lower overall social adjustment were predictive of suicide attempter classification, regardless of diagnosis. Borderline disordered patients low on overall social adjustment were over 16 times more likely to have attempted suicide than patients diagnosed with major depression only. Recent life events may elevate suicide risk in groups already at high risk for suicide completion, whereas high levels of social adjustment may be protective against stress-related suicidal behavior.     

An experimental investigation into judgment and behavioral implications of disability‐based stereotypes in simulated work decisions: Evidence of shifting standards

We investigated the explanatory relevance of the shifting standards model to the role of employee disability in two simulated organizational processes: (a) job performance appraisal and (b) resource allocation. Two experimental studies found evidence of the shifting standards effect—employees with and without a disability received similar ratings when subjective judgment standards were employed, but those without a disability received significantly higher performance ratings than their counterparts with a disability when rated with objective standards. Furthermore, the analysis of the ranking process on the dimension of deservingness of limited resources yielded evidence that disability‐related stereotypes can differentially affect perceptions of deservingness through the allocation of organizational resources.     

Friendship Work on Facebook: Young Adults' Understandings and Practices of Friendship

Young adults use social networking sites (SNSs) such as Facebook to engage as friends, yet there has been little systematic research that has investigated their sense‐making of friendship in relation to their uses of Facebook, as well as how Facebook as a socio‐technical system interacts with their friendship practices. Twelve friendship discussion groups were conducted in urban and non‐urban New Zealand, with 26 women and 25 men aged 18–25 years, in same and mixed‐gender groups. Our social constructionist thematic analysis showed the young adults made sense of friendship through themes of ‘fun times together’, an ‘investment’, ‘protection’ and ‘self‐authenticity’, and these meanings were enacted in particular ways within Facebook. This SNS was used primarily for enjoying friendship and ‘investing in’ friendships, and friendship protection was required to maintain friends' online privacy. Facebook provided a way to demonstrate self‐authenticity within friendship relationships through censored ‘show off’ self‐displays and favoured friendship activities. Facebook supported, disrupted and modified these particular friendship understandings by broadening the audience for friendship actions and intensifying friends' responses through 24/7 accessibility and instantaneous activity notifications. These interactions between friendship understandings and Facebook as a socio‐technical system demonstrate how friendship was reinforced, negotiated and re‐worked through this online context. Copyright © 2014 John Wiley & Sons, Ltd.