Friday, April 5, 2019

Motivational Impairment in Schizophrenia

Motivational Impairment in SchizophreniaANTICIPATING PLEASURE AND EFFORT IN SCHIZOPHRENIA 1Do People With Schizophrenia Have impediment Anticipating Pleasure, Engaging in gruelling Behavior, or Both?David E. Gard, Amy H. Sanchez, Kathryn Cooper, Melissa Fisher, Coleman Garrett, and Sophia VinogradovCitationGard, D. E., Sanchez, A. H., Cooper, K., Fisher, M., Garrett, C., Vinogradov, S. (2014, August 18). Do People With Schizophrenia Have Difficulty Anticipating Pleasure, Engaging in Effortful Behavior, or Both?. Journal of Abnormal Psychology. Advance online publication. http//dx.doi.org/10.1037/abn0000005IntroductionThe important purpose of this have was to investigate the effects of motivational impairment on the destination directed doings of individuals diagnosed with dementia praecox. This was accomplished by measuring the take aims of pleasure ( reinforcement) and leadenness in the activities and next goals of the subjects. These two factors were selected to be measu red cod to the fact that they are two of the comp unrivallednt processes of motivation which has been proven by previous look to be affected by schizophrenic disorder. explore has found inconsistencies in the assessment of pleasure and reward in dementia praecox patients. For instance, while Anhedonia has been frequently reported to be associated with schizophrenia (Herbener Harrow, 2002 take Gard et al., 2014), patients do non report a decrease in pleasure or positive stimuli (Cohen Minor, 2010 see Gard et al., 2014). These inconsistencies have been explained to be the result of percipient distinctions amidst the different temporal components associated with specialized types of reward and pleasure. Schultz (2002) and Wise (2002) (as cited in Gard et al., 2014) have shown that there is a physiological difference in how anticipatory pleasure and consummatory (in-the moment) pleasure are processed in the brain. term consummatory pleasure incriminates serotonergic and op ioid systems, anticipatory pleasure involves dopaminergic and mesolimbic projections (Schultz, 2002 Wise, 2002 see Gard et al., 2014). In another study conducted employ an Ecological flying judgement (EMA), actors with schizophrenia showed similar levels of consummatory pleasure, but depleted levels of anticipatory pleasure (Gard et al., 2007 see Gard et al., 2014). Consequently, pleasure was selected to be a dependent variable (DV) in this study.Individuals diagnosed with schizophrenia have reported difficulty in anticipating rewards (Buck Lysar, 2013 Gard et al., 2007 see Gard et al., 2014) as well as in processing rewards (Strauss, Waltz Gold 2008 see Gard et al., 2014). The link between reward and motivation has been established through the study conducted by Juckel et al. (2006) (as cited in Gard et al., 2014) which showed reduced ventral striatal activating during reward processing from individuals diagnosed with schizophrenia decreased ventral striatal activation has been associated with anhedonia (Juckel et al., 2006 see Gard et al., 2014). This likewise relates reward to anticipatory pleasure.Research has indicated that patients with high negative symptoms of schizophrenia have difficulty assessing the effort required to accomplish a caper which would provide a high reward (Gold et al., 2013 see Gard et al., 2014). Furthermore, in addition to difficulties assessing the effort involved, patients overly appeared to have difficulty putting in the effort required to do a particular task. In relation to reward, Fervaha, Graff-Guerrero, et al. (2013) (as cited in Gard et al., 2014) showed that patients of schizophrenia only had problems when it came to the assessment of the effort involved to achieve a reward, and not when ascertaining the value of a reward. (Fervaha, Graff-Guerrero, et al. 2013 see Gard et al., 2014)In light of the aforementioned findings in past literature, the researchers came up with collar assumptions, and the resulting re search questions reflected them. The assumptions were that individuals diagnosed with schizophrenia would haveA deficit in anticipatory pleasureDifficulty in anticipating and processing rewardsDifficulty assessing and expending the necessary effort required to accomplish a task exploitation these assumptions, the researchers of the present study came up with 5 research questions. The following has been taken from Gard et al. (2014)Compared with a socio-demographic each(prenominal)y matched conference of efforting(a) participants, do participants with schizophrenia demonstrate fewer daily activities and goals, decreased anticipatory pleasure for their upcoming goals, decreased pleasure-based goals, but intact in-the-moment pleasure? (Hypothesis)Do participants with schizophrenia pursue goals and activities that are less effortful than healthy comparison participants, and do they have difficulty assessing the effort of an upcoming goal? (Hypothesis)Do people with schizophrenia hav e difficulty completing their goals, and is this related to anticipation or experience of pleasure, or to how effortful the goal is? (Hypothesis)In people with schizophrenia, what is the relationship of anticipatory pleasure and effort exertion or assessment to cognitive dysfunction, symptoms, and functioning? (Alternative Hypothesis)To what degree could group differences found in Questions 1 4 be explained by any(prenominal) other non-diagnostic group differences? (Alternative Hypothesis)ParticipantsThe selection of participants differed between the tryal and control group. The subjects for the control group were selected through postings on the Internet and the distribution of flyers in the San Francisco Bay Area. Initially, forty-three individuals agreed to participate and signed the informed react forms. However two of them dropped fall out one, finding the study to be too a great contend of a burden, dropped out on the first day, and the other failed to respond to even a third of the phone calls. The subjects for the experimental group were selected from outpatient clinics and day treatment centers in the Bay Area. Fifty patients of schizophrenia initially signed the informed hope forms but three decided to drop out two dropped out even before the experiment started citing that it was too intrusive, and the other dropped out afterward two calls on the first day. All in all, the results of the study were formulated based on the results from forty-one subjects without schizophrenia and forty-seven subjects with either schizophrenia (n=31) and schizoaffective disorder (n=16). Diagnoses for the conditions were corroborate for all participants using the DSM-IV-TR.Strict exclusion criteria for the whole sample, and especially for the patient group, were established and implemented. Individuals who had had traumatic detail injuries which leads to bouts of unconsciousness, had substance abuse problems in the blend in six months, mental disorders, or il literate in position were all excluded. Patients who had been hospitalized in the last three months or had had their medication or dosage changed in the last month were also excluded from the study. Both groups were predominantly white males and had relatively no demographic differences between groups boot out for the symptoms for the disorder and employment rates. Only 17 percent of the individuals in the patient groups were employed full magazine or part sentence (4% and 13% paying attentionively), compared to the 68 percent of full time and part time employees (24% and 44% watch overively) in the control group. The experimenters did account for this discrepancy during the results phase.MethodFour different types of assessments were utilize during this study, although the EMA remained the chief(a) form of assessment of pleasure and effort. The Ecological Momentary Assessment is generally used in situations where specific activities and goals of the participants in a study ne ed to be explicated. This study utilized a modified random variable of the EMA where cellular telephone phone calls were used instead of the traditional self-report forms, which were filled at particular intervals of time cell phones were provided to every participant irrespective of who does or doesnt own a cell phone. Trained research assistants called each participant four times every day, between 0900hrs and 2100hrs, for seven days to conduct a semi-structured interview. A majority of the questions were open ended and participants were encouraged to give detailed descriptions of their daily activities and goals. Some questions asked them how much pleasure/effort was associated with a particular task their responses were rated on a Likert Scale (0 = not at all 5 = extremely). The answers were categorized based on the research questions. Four independent raters then scored the pleasurability, effortfulness, difficulty, and etc of all the goals and activities reported by the part icipants on a 0-3 Likert Scale. A subset of participants with no demographic differences from the original sample was also time-tested to catch out the difficulty of the tasks they attempted also measured on a 0-5 Likert Scale.After the point of the week of EMA, two independent research assistants travelled to the homes of the participants in order to determine the levels of stimulation and reward provided by the environment. Several subjects from the patient and control group (seven and nine respectively) decided to opt out from this coif of assessment citing different reasons. The levels of stimulation and reward were measured in terms of three elements aesthetics of the home, handiness of media, and social stimulation. These were measured using a combination of a modified version of the Environmental Assessment Scale (EASy) and the Home Observation for the Measurement of the Environment (HOME). Scores from each of the three elements as well as individual scores were averaged the results had high inter-rater reliability. ii additional assessments were conducted on the patient group they were tested for neurocognition, and were also clinically rated for functioning. During the former, 40 subjects with no demographic differences completed a Measurement and Treatment Research to Improve Cognition in Schizophrenia (METRICS) Consensus Cognitive Battery. An overall average of their results was used for all the future analyses. During the latter, a Quality of Life Scale (QLS) was used to assess overall functioning of patients with respect to elements such as social initiative and capacity for empathy motivation and anhedonia were not measured since they were already been used as DVs for the EMA.ProcedureRigorous pilot testing was carried before the actual experiment was conducted. Factors such as whether participants earn what the terms activity and goals meant in the context of the present study were determined during the piloting phase. After participants were selected, orientations on how to flop respond to an EMA during laboratory testing were conducted they were subsequently required to provide written informed consent before going any further. Most of the basic questions that research assistants asked during the study were previously determined with respect to their effectiveness.Before they were provided a larger sample of the study to be rated, the coders were extensively trained for their task using a smaller subset of the original sample. When the results from the EMA were presented to the four independent raters, the responses from the experimental and control group were presented together in a randomized fashion. Attributes that were to be rated by the coders (such as sweet activities and effortful activities) were clearly defined at heart parameters.As previously mentioned, cell phones were provided to each participant to be used purely for the purposes of the study, and to be returned after its conclusion. The EMA and subsequent home assessments were recorded on audio for post hoc quality assessment. Monetary compensations were provided to every participant upon the completion of the whole study (marked by the returning of the cell phones) and for the completion of the several different assessments conducted during it the amounts were different for each assessment.Data AnalysisThe independent variables (IVs) for all stages of assessment were individuals with schizophrenia and individuals without schizophrenia. The dependent variables (DVs), however, werent as consistent throughout the experiments, except for pleasure and effort. A number of other variables such as reward, difficulty, and sociableness were also measured during the different stages of the study. The basic design of every experiment conducted in the study was to determine how the experimental group was different from the control group with respect to the numerous DVs they were being tested on.Two types of analyses were used to det ermine the statistical significance of the results obtained. The theoretical principles of these analyses are too convoluted to be properly explained, but for all intents and purposes, they seem to have been implemented correctly. Hierarchical Linear Modeling (HLM) was used in EMA analyses. Its effectiveness comes from the fact that it can categorize data into separate levels so that analysis of data from one level wouldnt influence others. The EMA data were separated into Level one data (the multiple observations of participants) and level two data (between group differences in terms of neurocognition and functioning). For each research question and assessment, separate analyses of reading (ANOVA) were computed and their significance determined. Significance levels obtained through the HLM were presented as pseudo-r2.Independent sample t tests were conducted on the results obtained during the home assessments. It was used to determine whether or not the average level of stimulatio n that was computed for the control and experimental group was significant, with respect to each of the three aforementioned elements they were being measured on. Furthermore, the significance for the results of all five of the research questions seems to involve computation of t tests. The p values for them varied from 0.5, 0.1, and 0.001.Limitations and Future ResearchDr. Marvin Monroe,Department of Psychology,Springfield UniversitySir,As requested, I have look backed the study about pleasure and effort in schizophrenia, and it has got a number of evoke findings. Analysis of the results revealed that subjects with schizophrenia indeed set less effortful goals and engaged in less effortful activities. They also found that patients had difficulty determining with accuracy how difficult or effortful a task was going to be (in terms of resultant rewards). However, unlike the two aforementioned findings which were within the researchers expected results, the terminal finding was not it showed that patients with schizophrenia engaged in more pleasurable activities, and that they set goals that were, and also expect by them, to be more pleasurable.I also analyzed the study for potential limitations and further research areas. In terms of limitations, it had many. Employment differences between the two sample groups felt like a deal breaker however, the researchers did not find any significant difference when they computed the study for employment differences. The researchers themselves pointed out many, if not most, of the limitations that I found in this study. They highlighted four of them in the discussions and gave possible reasons for their occurrence. The foremost limitation according to the researchers was the reason behind the unexpected result which disproved their hypothesis. According to them, the social interactions with the research assistants might have induced pleasurable feelings within some participants. Other limitations include them focusing s olely on short-term goals, the relatively raw use of home assessment as a tool for measuring motivation in schizophrenia patients (which they also pointed out as a future research area), and the fact that some assessments used fewer number of participants than the actual sample group.The researchers reported that there are no data available on the relationship between effort assessment and functioning and the assessment of effort in daily flavor in Schizophrenia. Another key area of research could be why social interactions change magnitude anticipatory pleasure in patients with schizophrenia.This study illustrates several different ways in which schizophrenia patients could attach their motivation about everyday activities and goals. It was a very fascinating read. Thank you for giving me the opportunity to review such a study.Sincerely,Ibrahim Fatheen Abdul Sameeu

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