Kenneth Gilhooly

Differentiating insight from non-insight problems

This study aimed to investigate whether a range of tasks that have been generally classed as requiring insight form an empirically separable group of tasks distinct from tasks generally classed as non-insight. In this study, 24 insight tasks, 10 non-insight tasks, and tests of individual differences in cognitive abilities and working memory were administered to 60 participants. Cluster analysis of the problem-solving tasks indicated that the presumed insight problems did tend to cluster with other presumed insight problems, and similarly the presumed non-insight problems tended to cluster with other presumed non-insight tasks. Performance on presumed insight problems was particularly linked to measures of ideational flexibility with a different pattern of results for the non-insight tasks. Spatial insight problems were linked to spatial flexibility and verbal insight tasks were linked to vocabulary scores. The results are discussed in relation to recent developments of dual process theories of thinking.

Verbal Representations and Spatial Manipulation During Mental Synthesis

A series of three experiments is reported that have examined how the specialist components of the working memory model (Baddeley, 1986; Baddeley & Hitch, 1974) are involved during the performance of mental synthesis. The results indicate that the spatial manipulation of material during synthesis draws on the resources of spatial working memory, whereas the maintenance of verbal representations can play an important role in making effective use of cognitive resources during the task as a whole. These results are interpreted within the framework of a revised model of visuo-spatial working memory, in which the specialist components act as temporary storage buffers for visuo-spatial and verbal material, whereas the generation and maintenance of conscious visual images is primarily seen as being a function of the central executive component.

Mental planning and the Tower of London task.

The Tower of London (TOL) task has been used extensively as a test of planning ability in neuropsychological patients and normal populations. Participants are asked to preplan mentally a sequence of moves to match a start set of discs to a goal, and then to execute the moves one by one. The mental preplanning stage has been identified as critical to efficient performance. The current experiments examined whether manipulations of mental preplanning influence performance on the TOL. In Experiment 1, the effect of different planning instructions was examined. Those told to make full mental plans spent considerably longer in planning than participants given no specific planning instructions, yet there was no effect of instruction condition on the efficiency of executing plans. Experiment 2 investigated whether people were able to plan mentally, by looking at their ability to identify intermediate states of an optimum mental plan. Results indicated that most individuals could make accurate preplans up to two subgoals ahead, but not three. However, making an efficient preplan did not result in better subsequent execution of moves to solve the TOL trial. It is concluded that people can make effective mental plans for a limited number of moves. However, on the TOL task, mental preplanning does not offer benefits in terms of quicker performance, or more accurate solution. The nature of planning in the TOL task is therefore questioned.

The effects of adult aging and induced positive and negative mood on planning

Changes in executive functions have been found in older adults and also in young adults experiencing positive or negative mood states. The current study investigated the hypothesis that older adults would show greater executive function impairment following mood induction than young adults. Ninety-six participants (half aged 19-37, half aged 53-80) completed a neutral, positive, or negative mood induction procedure, followed by the Tower of London planning task. Significant interactions were found between age and mood such that older adults showed greater planning impairment than young adults in both the positive and negative mood conditions. Emotionally salient events occurring before testing may interfere with executive function in older adults.

Executive functions in insight versus non-insight problem solving: An individual differences approach

This study investigated the roles of the executive functions of inhibition and switching, and of verbal and visuo-spatial working memory capacities, in insight and non-insight tasks. A total of 18 insight tasks, 10 non-insight tasks, and measures of individual differences in working memory capacities, switching, and inhibition were administered to 120 participants. Performance on insight problems was not linked with executive functions of inhibition or switching but was linked positively to measures of verbal and visuo-spatial working memory capacities. Non-insight task performance was positively linked to the executive function of switching (but not to inhibition) and to verbal and visuo-spatial working memory capacities. These patterns regarding executive functions were maintained when the insight and non-insight composites were split into verbal and spatial insight and non-insight composite scores. The results are discussed in relation to dual processing accounts of thinking.

Visuo-spatial and verbal working memory in the five-disc Tower of London task: An individual differences approach

This paper reports a study of the roles of visuo-spatial and verbal working memory capacities in solving a planning task—the five-disc Tower of London (TOL) task. An individual differences approach was taken. Sixty adult participants were tested on 20 TOL tasks of varying difficulty. Total moves over the 20 TOL tasks was taken as a measure of performance. Participants were also assessed on measures of fluid intelligence (Ravens matrices), verbal short-term storage (Digit span), verbal working memory span (Silly Sentence span), visuo-spatial short-term storage (Visual Pattern span and Corsi Block span), visuo-spatial working memory (Corsi Distance Estimation), visuo-spatial processing speed (Manikin test), and verbal speed (Rehearsal speed). Exploratory factor analysis using an oblique rotation method revealed three factors which were interpreted as (1) a visuo-spatial working memory factor, (2) an age-speed factor, and (3) a verbal working memory factor. The visuo-spatial and verbal factors were only moderately correlated. Performance on the TOL task loaded on the visuo-spatial factor but did not load on the other factors. It is concluded that the predominant goal-selection strategy adopted in solving the TOL relies on visuo-spatial working memory capacity and particularly involves the active “inner scribe” spatial rehearsal mechanism. These correlational analyses confirm and extend results previously obtained by use of dual task methods, (Phillips, Wynn, Gilhooly, Della Sala, & Logie, 1999).

Biomedical knowledge in diagnostic thinking: The case of electrocardiogram (ECG) interpretation

The role of biomedical knowledge concerning underlying anatomy and pathophysiology in diagnosis has been the subject of considerable controversy in the study of medical expertise. The issue is examined in the present paper in the context of electrocardiogram (ECG) interpretation. A study is reported of three levels of expertise in the diagnosis, explanation and recall of ECG traces varying in difficulty of diagnosis. Expertise effects were found in diagnostic accuracy and confidence and in incidental ECG trace recall following diagnosis. Analyses of think-aloud protocols indicated that biomedical thinking was more prevalent in the ECG domain for experts versus less skilled subjects and in explanation versus diagnostic tasks. Biomedical knowledge was mainly invoked to evaluate possible diagnoses.

Generic and Specialist Occupational Therapy Casework in Community Mental Health Teams

The aim of this research was to conduct a cluster analysis on data from 40 community mental health occupational therapists to determine if subgroups of therapists had differing referral prioritisation policies. A Wards cluster analysis showed four clusters to be present. These four subgroups of occupational therapists were found to differ according to several factors: the percentage of role dedicated to specialist occupational therapy or generic work, satisfaction with the balance in these roles, the number of hours worked, the number of professionally trained team members and the presence of referral prioritisation policies. The subgroups were named the aspiring specialists, the satisfied specialists, the satisfied genericists and the chameleons (those not set in applying a consistent or specific policy). The policies that led to mainly generic working gave greatest importance to clients who were potentially violent or at risk of suicide. The policies that led to more of an occupational therapy role gave particular importance to the reason for referral and the clients diagnosis. The College of Occupational Therapists has recommended that the majority of casework should be focused on specialist occupational therapy interventions (Craik et al 1998): most of the participants in this study were not meeting this recommendation. Although some aspired to being more specialist, the pressures to work generically may have been affecting referral policies.

Factors used in the detection of elder financial abuse: A judgement and decision-making study of social workers and their managers

Factors social workers use in practice to detect elder financial abuse are currently unknown. A critical incident technique was applied within a judgement analysis approach to elicit cue use. Only three factors were key to decision-making: who raises concern, the elder’s mental capacity and the nature of the financial anomaly occurring.

A meta-review of stress, coping and interventions in dementia and dementia caregiving

BackgroundThere has been a substantial number of systematic reviews of stress, coping and interventions for people with dementia and their caregivers. This paper provides a meta-review of this literature 1988-2014.MethodA meta-review was carried out of systematic reviews of stress, coping and interventions for people with dementia and their caregivers, using SCOPUS, Google Scholar and CINAHL Plus databases and manual searches.ResultsThe meta-review identified 45 systematic reviews, of which 15 were meta-analyses. Thirty one reviews addressed the effects of interventions and 14 addressed the results of correlational studies of factors associated with stress and coping. Of the 31 systematic reviews dealing with intervention studies, 22 focused on caregivers, 6 focused on people with dementia and 3 addressed both groups. Overall, benefits in terms of psychological measures of mental health and depression were generally found for the use of problem focused coping strategies and acceptance and social-emotional support coping strategies. Poor outcomes were associated with wishful thinking, denial, and avoidance coping strategies. The interventions addressed in the systematic reviews were extremely varied and encompassed Psychosocial, Psychoeducational, Technical, Therapy, Support Groups and Multicomponent interventions. Specific outcome measures used in the primary sources covered by the systematic reviews were also extremely varied but could be grouped into three dimensions, viz., a broad dimension of “Psychological Well-Being v. Psychological Morbidity” and two narrower dimensions of “Knowledge and Coping” and of “Institutionalisation Delay”.ConclusionsThis meta-review supports the conclusion that being a caregiver for people with dementia is associated with psychological stress and physical ill-health. Benefits in terms of mental health and depression were generally found for caregiver coping strategies involving problem focus, acceptance and social-emotional support. Negative outcomes for caregivers were associated with wishful thinking, denial and avoidance coping strategies. Psychosocial and Psychoeducational interventions were beneficial for caregivers and for people with dementia. Support groups, Multicomponent interventions and Joint Engagements by both caregivers and people with dementia were generally found to be beneficial. It was notable that virtually all reviews addressed very general coping strategies for stress broadly considered, rather than in terms of specific remedies for specific sources of stress. Investigation of specific stressors and remedies would seem to be a useful area for future research.