Reanalyzing the Maia and McClelland (2004) Empirical Data: How Do Participants Really Behave in the Iowa Gambling Task?

Background: Since 2007, the Iowa Gambling Task (IGT) has been a standardized clinical assessment tool for assessing decision behavior in 13 psychiatric/neurological conditions. After the publication of Maia and McClelland's (1) article, there were two responses in 2005 from Bechara et al. and Maia and McClelland, respectively, discussing whether implicit emotion or explicit knowledge influences the development of foresighted decision strategies under uncertain circumstances (e.g., as simulated in the IGT). Methods and Results: We reanalyze and verify the data obtained by Maia and McClelland (1) in their study "What participants really know in the Iowa Gambling Task" and find that decision-makers were lured into shortsighted decisions by the prospect of immediate gains and losses. Conclusion: Although the findings of this reanalysis cannot support any arguments concerning the effect of either implicit emotion or explicit knowledge, we find evidence that, based on the gain-loss frequency in the IGT, participants behave myopically. This is consistent with most IGT-related articles (58 out of 86) in Lee et al.'s (2) cross-cultural review. Alternatively, under uncertain circumstances, there is probably no such thing as foresighted decision strategy irrespective of the proposed mechanisms of implicit emotion or explicit knowledge.

Effects of case management intervention for people with dementia and their carers: A systematic review and meta-analysis of experimental studies.

BACKGROUND: Case management has been developed and suggested as a method for improving the quality of dementia care by optimising care service and delivery using a feasible and cost-effective approach. However, the effects of case management for improving dementia care remain inconclusive. AIM: To analyse the efficacy of case management interventions for people with dementia and their carers. DESIGN: Systematic review and meta-analysis. METHODS: This study conducted a systematic review of the literature from January 1, 2002, to March 15, 2021, indexed in the following databases: Academic Search Complete, CINAHL, Cochrane Library, EMBASE, MEDLINE, PubMed, OVID, and Web of Science. Intervention studies examining patients with dementia and their carers published in the English language were included. The methodological quality of included studies was evaluated using the PEDro scale. The meta-analysis was performed using a random-effects model to calculate the pooled standardised mean difference (SMD) of case management intervention outcomes for both people with dementia (cognitive function, neuropsychiatric symptoms, and quality of life) and their carers (carer burden). Stata 16.0 was used for statistical analysis. RESULTS: A total of eight studies met the eligibility criteria for this study. The results of the quantitative analysis, ranging from 6 to 18 months, showed no significant effect on cognitive function, quality of life over 12 months and longer, and carer burden over time between groups with and without intervention. However, significant improvements were observed for neuropsychiatric symptoms over 12 months and longer and quality of life at six months in the case management group. CONCLUSION: Case management appears to have the potential to improve the health outcomes among people with dementia. However, these conclusions are limited due to the lack of conducted studies. Future work examining intervention outcomes remains necessary to explore the effects of interventions on the mental and physical wellbeing of carers.

Recollecting Cross-Cultural Evidences: Are Decision Makers Really Foresighted in Iowa Gambling Task?

The Iowa Gambling Task (IGT) has become a remarkable experimental paradigm of dynamic emotion decision making. In recent years, research has emphasized the "prominent deck B (PDB) phenomenon" among normal (control group) participants, in which they favor "bad" deck B with its high-frequency gain structure-a finding that is incongruent with the original IGT hypothesis concerning foresightedness. Some studies have attributed such performance inconsistencies to cultural differences. In the present review, 86 studies featuring data on individual deck selections were drawn from an initial sample of 958 IGT-related studies published from 1994 to 2017 for further investigation. The PDB phenomenon was found in 67.44% of the studies (58 of 86), and most participants were recorded as having adopted the "gain-stay loss-randomize" strategy to cope with uncertainty. Notably, participants in our sample of studies originated from 16 areas across North America, South America, Europe, Oceania, and Asia, and the findings suggest that the PDB phenomenon may be cross-cultural.