Manipulating attentional load in sequence learning through random number generation

Implicit learning is often assumed to be an effortless process. However, some artificial grammar learning and sequence learning studies using dual tasks seem to suggest that attention is essential for implicit learning to occur. This discrepancy probably results from the specific type of secondary task that is used. Different secondary tasks may engage attentional resources differently and therefore may bias performance on the primary task in different ways. Here, we used a random number generation (RNG) task, which may allow for a closer monitoring of a participant's engagement in a secondary task than the popular secondary task in sequence learning studies: tone counting (TC). In the first two experiments, we investigated the interference associated with performing RNG concurrently with a serial reaction time (SRT) task. In a third experiment, we compared the effects of RNG and TC. In all three experiments, we directly evaluated participants' knowledge of the sequence with a subsequent sequence generation task. Sequence learning was consistently observed in all experiments, but was impaired under dual-task conditions. Most importantly, our data suggest that RNG is more demanding and impairs learning to a greater extent than TC. Nevertheless, we failed to observe effects of the secondary task in subsequent sequence generation. Our studies indicate that RNG is a promising task to explore the involvement of attention in the SRT task.     

Hemispheric asymmetry in the efficiency of attentional networks

Despite the fact that hemispheric asymmetry of attention has been widely studied, a clear picture of this complex phenomenon is still lacking. The aim of the present study was to provide an efficient and reliable measurement of potential hemispheric asymmetries of three attentional networks, i.e. alerting, orienting and executive attention. Participants (N=125) were tested with the Lateralized Attention Network Test (LANT) that allowed us to investigate the efficiency of the networks in both visual fields (VF). We found a LVF advantage when a target occurred in an unattended location, which seems to reflect right hemisphere superiority in control of the reorienting of attention. Furthermore, a LVF advantage in conflict resolution was observed, which may indicate hemispheric asymmetry of the executive network. No VF effect for alerting was found. The results, consistent with the common notion of general right hemisphere dominance for attention, provide a more detailed account of hemispheric asymmetries of the attentional networks than previous studies using the LANT task.     

Self-Efficacy and Psychological Well-Being in Cardiac Patients: Moderated Mediation by Affect and Meaning-Making

Abstract

Prior research suggests a potential moderated mediation effect between self-efficacy and psychological well-being. Based on the Meaning Making Model and the Broaden-and-Build Theory, this study examines the relationship between self-efficacy and psychological well-being in the moderated mediation perspective of affect and meaning-making in coronary heart disease patients. The questionnaires measuring self-efficacy, psychological well-being, affect, and meaning-making were used to collect data from one hundred and fifty six patients (73 women and 83 men) who were suffering from coronary heart disease. The patients had a history of coronary heart disease in the previous .1?7.9?years and were aged 47?82. Findings demonstrated that meaning-making mediated the indirect relationship between self-efficacy and psychological well-being. In addition, the moderated mediation effect of positive affect, but not of negative affect was significant. Positive affect moderated the indirect effect between self-efficacy and psychological well-being through meaning-making; the indirect effect was stronger when positive affect was high as opposed to low. The results suggest the interplay of affective and meaning-making processes in the relationship between self-efficacy and well-being.