Orienting to guilty knowledge

The Guilty Knowledge Test (GKT; Lykken, 1959) assesses whether suspects conceal information about a crime ( “guilty knowledge”). Previous studies have demonstrated larger physiological reactions to guilty knowledge compared to unknown information. In three experiments, we investigated whether guilty knowledge also demands attention. During an alleged polygraph examination, participants were presented with to‐be‐detected pictures ( “guilty knowledge”), nonsignificant, familiar pictures ( “mere knowledge”), and previously unseen pictures ( “neutral information”) for 250 ms in a modified dot probe task. In all three experiments, probe responses were slower on guilty knowledge trials as compared to the neutral trials. Results are discussed in terms of an information‐processing view on orienting to guilty knowledge.     

The pleasures of sex: An empirical investigation

This study examined associations between the pleasurability of various sexual activities and behavioural experience with these activities. Participants were 145 female and 78 male undergraduates. Participants rated the pleasurability of various sexual activities (vaginal intercourse, anal intercourse, receiving oral sex, performing oral sex, masturbation by a partner, and self-masturbation) and answered questions about their experience with these sexual activities. Vaginal intercourse, receiving oral sex, and being masturbated by a partner received the highest,pleasure ratings. For behaviours other than vaginal intercourse and receiving oral sex, pleasure ratings were significantly higher among respondents who had engaged in the activity. Pleasure ratings for several different sexual behaviours were intercorrelated. Participants who scored high on a pleasure index were more sexually experienced, engaged in more frequent sexual activity, and reported having more sex partners. Results are interpreted within the context of an evolutionary theory which suggests that pleasure motivates sexual behaviour.     

50 years on: the Shap working party on world religions in education and its publications

The Shap Working Party on World Religions in Education celebrates its 50th anniversary in April 2019. In marking this event, the present article offers a summary of the history of the Shap Working Party in relation to its publications. The overview includes material published by the Shap Working Party itself and material published by members of the Shap Working Party which reflects Shap’s general approach and values. Many Shap publications and articles about Shap are available with open access, on the Shap website – http://www.shapworkingparty.org.uk/ – and more will appear in celebration of the Working Party’s 50th Anniversary. The present article is dedicated to the memory of Professor John Hinnells who had a key role in establishing the Shap Working Party and who died in 2018.     

The attentional blink unveils the interplay between conscious perception,spatial attention and working memory encoding

Our ability to perceive two events in close temporal succession is severely limited, a phenomenon known as the attentional blink. While the blink has served as a popular tool to prevent conscious perception, there is less research on its causes, and in particular on the role of conscious perception of the first event in triggering it. In three experiments, we disentangled the roles of spatial attention, conscious perception and working memory (WM) in causing the blink. We show that while allocating spatial attention to T1 is neither necessary nor sufficient for eliciting a blink, consciously perceiving it is necessary but not sufficient. When T1 was task irrelevant, consciously perceiving it triggered a blink only when it matched the attentional set for T2. We conclude that consciously perceiving a task-relevant event causes the blink, possibly because it triggers encoding of this event into WM. We discuss the implications of these findings for the relationship between spatial attention, conscious perception and WM, as well as for the distinction between access and phenomenal consciousness.     

Varieties of sameness: the impact of relational complexity on perceptual comparisons

The fundamental relations that underlie cognitive comparisons—“same” and “different”—can be defined at multiple levels of abstraction, which vary in relational complexity. We compared response times to decide whether or not two sequentially-presented patterns, each composed of two pairs of colored squares, were the same at three levels of abstraction: perceptual, relational, and system (higher order relations). For both 150 ms and 5 s inter-stimulus intervals (ISIs), both with and without a masking stimulus, decision time increased with level of abstraction. Sameness at lower complexity levels contributed to decisions based on the higher levels. The pattern of comparison times across levels was not predictable solely from encoding times. The results indicated that relations at multiple levels of complexity can be abstracted and compared in working memory, with higher complexity levels requiring more processing time. We simulated the impact of relational complexity on response time using Learning and Inference with Schemas and Analogies (LISA), a computational model of relational comparisons based on dynamic binding of elements into roles in a relational working memory.     

Pre-experimental sleep effects on directed forgetting

A directed forgetting (DF) paradigm was used to compare the remembering and forgetting of participants with good sleep quality to those with poor sleep quality and the presence of insomnia symptoms. This study implemented a point system in place of remember and forget instructions in a DF task with the goal of computing DF costs and benefits. Relations among memory, sleep, and working memory capacity (WMC) were also examined. DF benefits were observed in both groups, with negative costs found for participants without the presence of insomnia symptoms. WMC was found to be related to memory for positive point items only, and did not differ based on sleep quality. These results suggest that the presence of self-reported insomnia symptoms does not affect performance on a DF task.