False memory following rapidly presented lists: the element of surprise

This article examines a false memory phenomenon, the Deese-Roediger-McDermott (DRM) effect, consisting of high false alarms for a prototype word (e.g., SLEEP) following a study list consisting of its associates (NIGHT, DREAM, etc.). This false recognition is thought to occur because prototypes, although not presented within a study list, are highly activated by their semantic association with words that are in the list. The authors present an alternative explanation of the effect, based on the discrepancy-attribution hypothesis. According to that account, false (and true) familiarity results when a comparison between expectations and outcomes within a processing episode causes surprise. Experiment 1 replicates the DRM effect. Experiment 2 shows that a similar effect can occur when participants are shown lists of unrelated words and are then surprised by a recognition target. Experiments 3 and 4 show that the DRM effect itself is abolished when participants are prevented from being surprised by prototypes presented as recognition targets. It is proposed that the DRM effect is best understood through the principles of construction, evaluation, and attribution.     

Effect of uncertainty on the time course for selection of verbal name codes

Response selection takes time. Hick's law (Hick, 1952) predicts that the time course of response selection is a logarithmic function of the number of equally likely response alternatives. However, recent work has shown that oculomotor responses constitute noteworthy exceptions in that the latencies of saccades (Kveraga, Boucher, & Hughes, 2002) and smooth pursuit movements (Berryhill, Kveraga, Boucher, & Hughes, 2004) are completely independent of response uncertainty. This finding extends to the case in which the required response was known in advance (i.e., simple reaction times [RTs] were equivalent to choice RTs). In view of these results, we reevaluated reports that latencies to name visually presented digits (Experiment 1) and/or repeat aurally presented digits (Experiment 2) are similarly independent of the size of the response set. We found that naming latencies were equivalent for response set sizes from one to eight, but simple RTs (response set of one) were faster. Thus, the overlearned task of digit naming is indeed highly automatic but has not reached the level of automaticity characteristic of the oculomotor system.     

Practice effects on coordination and control,metabolic energy expenditure,and muscle activation

One defining characteristic of skilled motor performance is the ability to complete the task with minimum energy expenditure. This experiment was designed to examine practice effects on coordination and control, metabolic energy expenditure, and muscle activation. Participants rowed an ergometer at 100 W for ten 16-min sessions. Oxygen consumption and perceived exertion (central and peripheral) declined significantly with practice and movement economy improved (reliably) by 9%. There was an associated but non-significant reduction in heart rate. Stroke rate decreased significantly. Peak forces applied to the ergometer handle were significantly less variable following practice and increased stability of the post-practice movement pattern was also revealed in more tightly clustered plots of hip velocity against horizontal displacement. Over practice trials muscle activation decreased, as revealed in integrated EMG data from the vastus lateralis and biceps brachii, and coherence analysis revealed the muscle activation patterns became more tightly coordinated. The results showed that practice reduced the metabolic energy cost of performance and practice-related refinements to coordination and control were also associated with significant reductions in muscle activation.     

Acting Nasty in the Face of Failure? Longitudinal Observations of “Hard-to-Manage” Children Playing a Rigged Competitive Game with a Friend

Peer problems are almost universal among children with disruptive behavior disorders, and have been linked to social information processing deficits that lead to heightened threat responses (K. A. Dodge, 1980). This 2-year longitudinal study uses direct observations to examine the real-life significance of this finding. Forty hard-to-manage children and 40 typically developing control children were filmed at ages 5 and 7 playing a rigged competitive game in which they experienced a clear threat of losing. Group differences in negative behavior (hard-to-manage > controls) were stable over time and independent of verbal ability. Predictors of individual differences in negative behavior were also examined. Previous studies with this sample have shown that at 4 years of age, the hard-to-manage children displayed elevated frequencies of violent pretend play (J. Dunn & C. Hughes, 2001), coupled with poor performance on tests of executive function and theory of mind (C. Hughes, J. Dunn, & A. White, 1998). In this study, 4-year-olds whose pretend play indicated a preoccupation with violence were more likely to respond negatively to the threat of losing a competitive game at age 5 and at age 7. Four-year-olds who performed poorly on tests of theory of mind and executive function showed higher rates of negative behavior at age 5 but not age 7. These findings highlight just a few of the multiple paths leading to peer problems among children with disruptive behavior problems.     

Erratum to: Evaluating perceptual integration: uniting response-time and accuracy-based methodologies

Attention, Perception, & Psychophysics -     

Linking clergy psychological type profile and church growth in the Diocese of Chester: a pilot study

Two recent studies (one in England and one in Australia) have linked church growth and church decline with the psychological type profile of church leaders. The present study, conducted within the Diocese of Chester, compares the psychological type profile of two groups of clergy who had served in the same parishes for five years or more: 29 leading declining churches and 19 leading growing churches. The data found a significantly higher preference for perceiving among those leading growing churches, although there were no significant differences in terms of the orientations, the perceiving process, or the judging process.     

Mapping the structure of perceptual and visual–motor abilities in healthy young adults

The ability to quickly detect and respond to visual stimuli in the environment is critical to many human activities. While such perceptual and visual–motor skills are important in a myriad of contexts, considerable variability exists between individuals in these abilities. To better understand the sources of this variability, we assessed perceptual and visual–motor skills in a large sample of 230 healthy individuals via the Nike SPARQ Sensory Station, and compared variability in their behavioral performance to demographic, state, sleep and consumption characteristics. Dimension reduction and regression analyses indicated three underlying factors: Visual–Motor Control, Visual Sensitivity, and Eye Quickness, which accounted for roughly half of the overall population variance in performance on this battery. Inter-individual variability in Visual–Motor Control was correlated with gender and circadian patters such that performance on this factor was better for males and for those who had been awake for a longer period of time before assessment. The current findings indicate that abilities involving coordinated hand movements in response to stimuli are subject to greater individual variability, while visual sensitivity and occulomotor control are largely stable across individuals.