ABSTRACTEmotional events tend to be remembered better than neutral events, but emotional states and stimuli may also interfere with cognitive processes that underlie memory performance. The current study investigated the effects of emotional content on working memory capacity, which involves both short term storage and executive attention control. We tested competing hypotheses in a preregistered experiment. The emotional enhancement hypothesis predicts that emotional stimuli attract attention and additional processing resources relative to neutral stimuli, thereby making it easier to encode and (...) store emotional information in WMC. The emotional impairment hypothesis, by contrast, predicts that emotional stimuli interfere with attention control and the active maintenance of information in working memory. Participants completed a common measure of WMC (the operation span task; Turner, M. L., & Engle, R. W. [1989]. Is working memory capacity task dependent? Journal of Memory and Language, 28,... (shrink)

Although there has been steady progress elucidating the influence of emotion on cognition, it remains unclear precisely when and why emotion impairs or facilitates cognition. The present study investigated the mechanisms involved in the influence of emotion on perception and working memory, using modified 0-back and 2-back tasks, respectively. First, results showed that attentional focus modulated the impact of emotion on perception. Specifically, emotion facilitated perceptual task performance when it was relevant to the task, but it impaired performance when it (...) was irrelevant to the task. The differential behavioural effect of emotion on perception as a function of attentional focus diminished under high WM load. Second, attentional focus did not directly modulate the impact of emotion on WM, but rather its influence depended on the dynamic relationship between internal representations. Specifically, WM performance was worse when the material already being held online and the new input were of matching emotions, compared to when they were not. We propose that the competition between “bottom-up” and “top-down” processing for limited cognitive resources explains the nature of the influence of emotion on both perception and WM. (shrink)

Previous work suggests that threat-related stimuli are stored to a greater degree in working memory compared to neutral stimuli. However, most of this research has focused on stimuli with physically salient threat attributes, failing to account for how a “neutral” stimulus that has acquired threat-related associations through differential aversive conditioning influences working memory. The current study examined how differentially conditioned safe and threat stimuli are stored in working memory relative to a novel, non-associated stimuli. Participants completed a differential fear conditioning (...) task followed by a change detection task consisting of three conditions across two loads. Results revealed individuals successfully learned to distinguishing CS+ from CS– conditions during the differential aversive conditioning task. Our working memory outcomes indicated successful load manipulation effects, but no statistically significant differences in accuracy, response time, or Pashler’s K measures of working memory capacity between CS+, CS–, or N conditions. However, we observed significantly reduced RT difference scores for the CS+ compared to CS– condition, indicating greater RT differences between the CS+ and N condition vs. the CS– and N condition. These findings suggest that differentially conditioned stimuli have little impact on behavioral outcomes of working memory compared to novel stimuli that had not been associated with previous safe of aversive outcomes, at least in healthy populations. (shrink)

Inhibition-induced forgetting refers to impaired memory for the stimuli to which responses were inhibited. The present study aimed to examine if it would be modulated by the processing of threateni...

This thesis aimed at examining the impact of decorative pictures, defined as pictures which make an instructional material aesthetically appealing rather than conveying information for learning. In research, the use of decorative pictures was considered to be detrimental for learning for a long time. In contrast, recent research revealed that the impact of these pictures is moderated by a number of variables. In a series of experiments which were based on cognitive-affective theories of learning with media, a selected number of (...) theoretically derived moderators were examined in a series of experiments. A first experiment investigat-ed the effectiveness of different levels of emotional charge and the impact of different contexts shown in decorative pictures. Results showed that learning performance was higher for positive than negative pictures, while the measured pleasure of students mediated this effect. Decorative pictures showing a learning context were also found to enhance learning while the students’ assessments of arousal and dominance were raised for these pictures. In a second experiment, design features of anthropomorphism, defined as features which elicit the tendency to attribute human characteristics to non-human objects, were implemented in decorative pictures. Based on a two-factorial design with the inclusion of human faces and personalized labels, both human faces and personalized labels were found to foster learning. In comparison to a control group without decorative pictures, the inclusion of both mentioned anthropomorphic features in decorative pictures led to a higher learning performance. In contrast, decorative pictures without anthropomorphic features decreased learning. Both features additionally enhanced the mental effort and intrinsic motivation of students, although a task-irrelevant cognitive load was increased by the inclusion of decorative pictures. The emotional charge and the degree of text-picture connectedness of decorative pictures were additionally examined in three other experiments. Moreover, these groups were compared with an additional control group without decorative pictures. All three experiments revealed that decorative pictures with a strong connection to the learning topic of a text and a positive charge increased learning. In comparison with the control group, positive, strongly connected pictures mainly enhanced and negative, weakly connected pictures mainly impaired learning. Results can be explained by significant differences among the assessment of cognitive processes of learners. In conclusion, decorative pictures may be used in order to enrich an instructional material if boundary conditions like the context-relatedness, the degree of anthropomorphism, the text-picture connectedness, and the emotional charge are taken into account. (shrink)