Age differences in reading time allocation for propositionally dense sentences

Younger and older adults read and immediately recalled a set of sentences which varied in propositional density. Reading was self-paced and sentence reading time was measured. Older adults spent differentially more time reading the propositionally dense sentences, and although the overall recall performance of older adults was slightly poorer than that of younger adults, age differences were constant across propositional density. Consistent with the Slowing Hypothesis, an analysis of effective reading time (time spent per proposition recalled) demonstrated that older adults were spending proportionately more time to effectively encode the sentences. In addition, a relative memorability analysis (Stine & Wingfield, 1988, 1990a) suggested that the increase in propositional density did not particularly disrupt the organization of the text representation for older adults in this self-paced reading situation. This contrasts with earlier findings in a listening situation. These data provide support for the applicability of the Slowing Hypothesis to language processing, but also suggest that older adults are able to effectively allocate reading time to propositionally dense sentences in order to facilitate organizational processing.     

The Understanding of Pans in 3- to 6-Year-Old Children

In this study, we examined the extent to which preschool children were able to understand pans (continuous sideward shifts of a scene generated by rotating the camera around a virtual axis), one of the most typical technical elements of films. This was done by showing 60 participating children a film in which a teddy bear asked them questions about pan sequences. The questions could be answered correctly only if the underlying pan was understood. The study revealed that the increase in the children's comprehension of the pans was significantly correlated with age and was facilitated by gains in visual working memory (VWM). It was found that VWM in 3 year olds is generally so low that they are still not able to understand any pan sequences. Most of the pans were understood by those children who could remember the locations of two simple objects. This VWM level is sex dependent and is usually reached by boys at age 4 and by girls at age 5; thus, boys understand pans quite a bit earlier. Perception speed, pan speed, and television consumption played rather limited roles. An appropriate model for the understanding of pans is subsequently introduced and discussed.     

Repeatedly reactivated memories become more resistant to hippocampal damage

We examined whether repeated reactivations of a context memory would prevent the typical amnesic effects of post-training damage to the hippocampus (HPC). Rats were given a single contextual fear-conditioning session followed by 10 reactivations, involving a brief return to the conditioning context (no shock). Subsequently, the rats received sham or complete lesions of the HPC. When tested for retention, the HPC rats that experienced the reactivations froze significantly more than nonreactivation HPC rats and did not significantly differ from their respective control group. These findings suggest that memory reactivations contribute to long-term memories becoming independent of the HPC.     

The Emotional Development Scale: Assessing the Emotional Capacity of 4–12 Year Olds

The practice of assessing children’s emotional development based on a theoretical foundation of attachment theory, developmental psychology, and brain research is fast developing within the field of clinical psychology and family social work. The Emotional Development Scale (EDS) has been developed to assess the current emotional functioning level of 4–12 year olds within the theoretical framework of neuroaffective developmental psychology. Included in the pilot study were eight family treatment centers in Denmark, with 36 families participating. The psychometric investigation included analyses of interrater reliability, test-retest reliability, and internal consistency, while construct validity was analyzed by correlating EDS results between referred and nonreferred groups. The analysis between nonreferred and referred groups was based on the data from the empirical study and a preliminary ad hoc sample from Hogrefe Ltd. (n = 213). We concluded the EDS appears to be a reliable and partially valid tool that could aid in assessing the emotional development of 4–12 year olds. Further research on psychometric properties and clinical application of EDS is needed.     

Bright light treatment has limited effect in subjects over 55 years with mild early morning awakening

31 subjects, age 55 yr. or older, suffering from mild early morning awakening were randomized to either a bright light (10,000 lux) or to a red dim light placebo condition (200 lux). Light exposure took place in the evening in the patients' homes, 60 to 30 min. before bedtime and lasted for 3 wk. The subjects kept a sleep diary for 2 wk. and wore an actigraph for 1 wk. both before treatment and at post-treatment. Of the eight sleep diary outcome variables, significant effects that could be attributed to the light treatment were only detected for time spent in bed after final morning awakening. None of the six actigraph outcome variables yielded any significant effect of the light therapy. Explanations for the limited therapeutic effects of bright light treatment obtained in the present study are discussed, such as the criteria defining early morning awakening, the selection procedure, problems with compliance, age of the sample, and the dose of light. The lack of an objective circadian marker in this study could represent a problem concerning the timing of the light exposure. Despite the limited success of bright light therapy in this study, bright light therapy should still be considered as a treatment option for early morning awakening.