Biomedical subjects

Derek Heim

Publications and source records attributed to Derek Heim.

6 recordsLinked to original sources

PubMed2005

Encoding during the attentional lapse: accuracy of encoding during the semantic sustained attention to response task.

An experiment investigated the relationship between the ability to encode verbal stimuli during an attentional lapse. The task employed a variation on the sustained attention to response task (SART, Robertson, Manly, Andrade, Baddeley, & Yiend, 1997) which involved the detection of an infrequent target against a background of words. As a manipulation, participants were either instructed to encode the stimuli or were merely exposed to the stimuli. Retrieval was measured using process dissociation. Irrespective of the instructions given to the participants during the task, participants were more likely to retrieve information on the basis of recollection after an error was made than before, whilst the likelihood of retrieving information on the basis of familiarity remained invariant over the same period. The implications of this result for methods of investigating subjective experience are discussed.

Adult↗

PubMed2005

Variability in lay perceptions of depression: a vignette study.

This paper describes a study investigating lay perceptions of depression in terms of perceived severity. Students (N = 128) were presented with vignettes describing individuals with symptoms of depression based on DSM-IV. The descriptions were varied in terms of gender, social status, and a self-referent manner of communicating depressive symptomatology. Participants were asked to rate the degree to which vignette characters were thought to be depressed on a Likert-type scale. Results indicate that a non-self-referent style of communicating depressive symptoms by female vignette characters was seen as an indication of elevated levels of depression, and these findings are discussed with reference to the literature.

Adult↗

PubMed2004

An exploration of street drinking in Drumchapel, Scotland.

This paper describes the results of a survey undertaken to contribute to a health needs assessment of persistent street drinkers in Drumchapel, Greater Glasgow. Street drinkers, members of the public and local service providers [including agency professionals (community workers; health workers; social workers) and others (e.g. shopkeepers)] were interviewed. Street drinkers were generally male, single, unemployed and living in their own (rented) accommodation. Not being homeless, they gave volitional reasons for drinking in the street, centred on social aspects and the cost of drinking in traditional establishments/public houses. Half the group said they did not do all their drinking on the street, suggesting alternatives may be possible. Uptake of food offered to respondents being interviewed was low, and self-reported diet was poor in vitamins and unvaried. Awareness of services was low in the street drinking group, with friends/family remaining the most common source of support. Public concern was mainly with the visibility of the group and the negative impact this was perceived to have on the community; however, service providers focused on health risks associated with street drinking. Consensus on the need for some accommodation/centre for drinkers with access to services was established across all groups.

Adult↗

PubMed2004

Subjective experience and the attentional lapse: task engagement and disengagement during sustained attention.

Three experiments investigated the relationship between subjective experience and attentional lapses during sustained attention. These experiments employed two measures of subjective experience (thought probes and questionnaires) to examine how differences in awareness correspond to variations in both task performance (reaction time and errors) and psycho-physiological measures (heart rate and galvanic skin response). This series of experiments examine these phenomena during the Sustained Attention to Response Task (SART, Robertson, Manly, Adrade, Baddeley, & Yiend, 1997). The results suggest we can dissociate between two components of subjective experience during sustained attention: (A) task unrelated thought which corresponds to an absent minded disengagement from the task and (B) a pre-occupation with one's task performance that seems to be best conceptualised as a strategic attempt to deploy attentional resources in response to a perception of environmental demands which exceed ones ability to perform the task. The implications of these findings for our understanding of how awareness is maintained on task relevant material during periods of sustained attention are discussed.

Adult↗

PubMed2003

Task unrelated thought: the role of distributed processing.

Task unrelated thought (TUT) refers to thought directed away from the current situation; for example, a day dream. Encapsulated models of cognition propose that qualitative changes in consciousness, i.e., the production of TUT, can be explained in terms of changes in the quantity of resources deployed for task completion. In contrast, distributed models of cognition emphasize the importance of holistic processes in the generation and maintenance of task focus and are consistent with the effects of higher order variables such as schemata. Three experiments were conducted on healthy participants using a categorical stimulus organization to contrast distributed and encapsulated views of cognition. Experiments 1 and 2 showed that despite the increased difficulty of the alphabetical verbal fluency task fewer TUTs were produced during category fluency condition. Experiment 3 replicated the categorical suppression of TUT while encoding and recalling information in a memory task. The results of these three experiments support the predictions derived from models of cognition emphasizing the importance of stimulus organization in the generation and maintenance of task focus and have potential importance for the scientific evaluation of cognition.

Adult↗

PubMedDate not supplied

Alcohol consumption, perceptions of community responses and attitudes to service provision: results from a survey of Indian, Chinese and Pakistani young people in Greater Glasgow, Scotland, UK.

AIMS: To gather prevalence data regarding alcohol consumption and gauge perceptions of community responses to alcohol and service provision in a sample of Pakistani, Indian and Chinese young people aged 16-25 years, in Greater Glasgow, Scotland, UK. METHODS: A survey methodology utilizing purposive sampling techniques (n = 174) was employed. Data were collected using an interviewer-administered questionnaire. RESULTS: Alcohol consumption amongst the target populations is currently lower than that of the general population. Predictors of alcohol consumption were found to include self-reported importance of religion (a negative association with consumption) and having same-ethnicity friends who drink alcohol. There was a lack of consensus amongst participants regarding whether service provision should be part of the mainstream or specialist for black and minority ethnic individuals. CONCLUSIONS: Alcohol consumption in the target populations may be increasing and service provision could benefit by including specialist services for black and minority ethnic groups, in addition to mainstream services that need to be culturally sensitive.

Adolescent↗