Parenting young children with challenging behaviour

Previous research has established the link between harsh parenting and poor outcomes in children, although little attention has been paid to the concurrent protective factors which may exist. The relationship between parenting behaviours and childhood externalizing behaviours was investigated in a sample of 60 parents of young children (ages 2–5 years). Thirty families were selected for participation based on teacher‐reported externalizing behaviour in their young child which exceeded normal limits and matched with a sample of 30 parents of children without externalizing behaviour problems. Results found that parents of young children with externalizing behaviours tended to use more frequent verbal and corporal punishment with their young children, and reported more behaviour problems with their young children when compared with a control group. However, no significant differences were found between groups with respect to positive, nurturing behaviours, or utilizing appropriate developmental expectations. Implications for prevention are discussed. Copyright © 2005 John Wiley & Sons, Ltd.     

Perceived group variability and dispositional need for closure

Based on the closure motivation theory proposed by Kruglanski and Webster (1996), it was hypothesized that the extent of perceived variability of target group members would be related to dispositional need for closure. Israeli teachers (n = 160) judged their professors by means of two methods and answered the need for cognitive closure questionnaire (NFCS, Webster & Kruglanski, 1994). The findings show that need for closure is related to social judgment. The perception of participants high in need for closure was less differentiated and more extreme, in comparison to participants low in need for closure. Findings also yielded that measures of variability are method dependent.     

Evidence for the contribution of a threshold retrieval process to semantic memory

It is widely held that episodic retrieval can recruit two processes: a threshold context retrieval process (recollection) and a continuous signal strength process (familiarity). Conversely the processes recruited during semantic retrieval are less well specified. We developed a semantic task analogous to single-item episodic recognition to interrogate semantic recognition receiver-operating characteristics (ROCs) for a marker of a threshold retrieval process. We fitted observed ROC points to three signal detection models: two models typically used in episodic recognition (unequal variance and dual-process signal detection models) and a novel dual-process recollect-to-reject (DP-RR) signal detection model that allows a threshold recollection process to aid both target identification and lure rejection. Given the nature of most semantic questions, we anticipated the DP-RR model would best fit the semantic task data. Experiment 1 (506 participants) provided evidence for a threshold retrieval process in semantic memory, with overall best fits to the DP-RR model. Experiment 2 (316 participants) found within-subjects estimates of episodic and semantic threshold retrieval to be uncorrelated. Our findings add weight to the proposal that semantic and episodic memory are served by similar dual-process retrieval systems, though the relationship between the two threshold processes needs to be more fully elucidated.     

Diffusion versus linear ballistic accumulation: different models but the same conclusions about psychological processes?

Quantitative models for response time and accuracy are increasingly used as tools to draw conclusions about psychological processes. Here we investigate the extent to which these substantive conclusions depend on whether researchers use the Ratcliff diffusion model or the Linear Ballistic Accumulator model. Simulations show that the models agree on the effects of changes in the rate of information accumulation and changes in non-decision time, but that they disagree on the effects of changes in response caution. In fits to empirical data, however, the models tend to agree closely on the effects of an experimental manipulation of response caution. We discuss the implications of these conflicting results, concluding that real manipulations of caution map closely, but not perfectly to response caution in either model. Importantly, we conclude that inferences about psychological processes made from real data are unlikely to depend on the model that is used.     

Deletion of the GluA1 AMPA receptor subunit impairs recency-dependent object recognition memory

Deletion of the GluA1 AMPA receptor subunit impairs short-term spatial recognition memory. It has been suggested that short-term recognition depends upon memory caused by the recent presentation of a stimulus that is independent of contextual-retrieval processes. The aim of the present set of experiments was to test whether the role of GluA1 extends to nonspatial recognition memory. Wild-type and GluA1 knockout mice were tested on the standard object recognition task and a context-independent recognition task that required recency-dependent memory. In a first set of experiments it was found that GluA1 deletion failed to impair performance on either of the object recognition or recency-dependent tasks. However, GluA1 knockout mice displayed increased levels of exploration of the objects in both the sample and test phases compared to controls. In contrast, when the time that GluA1 knockout mice spent exploring the objects was yoked to control mice during the sample phase, it was found that GluA1 deletion now impaired performance on both the object recognition and the recency-dependent tasks. GluA1 deletion failed to impair performance on a context-dependent recognition task regardless of whether object exposure in knockout mice was yoked to controls or not. These results demonstrate that GluA1 is necessary for nonspatial as well as spatial recognition memory and plays an important role in recency-dependent memory processes.     

On the joint effects of repetition and stimulus quality in lexical decision: looking to the past for a new way forward

Two experiments investigated the joint effects of stimulus quality and repetition in the context of lexical decision. Experiment 1 yielded an interaction between repetition and stimulus quality for words (but additive effects for nonwords) when the lag was short, replicating previous reports. Experiment 2, with a much longer lag than Experiment 1, yielded main effects of stimulus quality and repetition, but these factors no longer interact. The joint effects of stimulus quality and repetition for words as a function of lag can be understood in terms of two loci for repetition effects: one short-term and one long-term. The transient effect of repetition is on activation levels in the lexicons (and in which the input lexicon, but not beyond, is affected by stimulus quality), whereas the long-term effect is on the strength of two-way connections between lexical-lexical and lexical-semantic modules. These data and others, taken together with the account, provide a new way of thinking about a 30-year-old conundrum.     

Seven Religious Reactions to Nanotechnology

Nanotechnology—the control of matter at the level of atoms and molecules—has evoked a large body of literature on moral and ethical issues. Almost all of this is expressed in secular voices. Religious commentaries about nanotechnology have been much more rare. And yet survey research indicates that religious belief will be one of the most powerful influences in shaping public views about nanotechnology. This paper argues that it is worth knowing what religious voices have said about nanotechnology, so that we might anticipate additional religious reactions in the future. After that, this paper presents seven cases of religious reactions to nanotechnology from a variety of faiths. This information gives us some insights about how religious individuals and institutions think about this technology, and also insights about how a new technology evokes a variety of hopes and fears.