Neuropsychology
Mohammadreza Noroozi Homayoon; Fatemeh Gohari Jopari; Esmaeil Sadri Damirchi
Abstract
The aim of the present study was to investigate the effectiveness of computerized cognitive rehabilitation on impulsivity and mindfulness in patients with schizophrenia. Method: This research was applied in purpose and semi-experimental (quasi-experimental) in design, employing a pre-test-post-test approach ...
Read More
The aim of the present study was to investigate the effectiveness of computerized cognitive rehabilitation on impulsivity and mindfulness in patients with schizophrenia. Method: This research was applied in purpose and semi-experimental (quasi-experimental) in design, employing a pre-test-post-test approach with a control group. The statistical population of this study included all individuals diagnosed with schizophrenia who met the inclusion criteria and were hospitalized at the Darolshafa chronic psychiatric rehabilitation center in Ardabil during the period of 1403-1404 (2024-2025). The instruments used in this study were the Positive and Negative Syndrome Scale (PANSS) by Kay et al. (1986), the Five-Factor Mindfulness Questionnaire (FFMQ) by Baer (2006), and the Impulsivity Questionnaire by Barratt (2004). Findings: The results of univariate analysis of covariance revealed that computerized cognitive rehabilitation significantly reduced impulsivity in the patients. Considering the significance level (P < 0.005) and effect size (η² = 0.258), it can be concluded that this intervention effectively improved impulsivity scores. Discussion and Conclusion: The findings indicate the effectiveness of computerized cognitive rehabilitation in enhancing impulsivity control and mindfulness in schizophrenia patients.
samane jasbe; Alireza Pirkhaefi
Abstract
Aim: The purpose of this study was comparing executive functions in patient with schizophrenia and obsessive-compulsive disorders with normal individual. Method: The research design was post- facto. The sample of this study included 32 patients with schizophrenia disorders, 31 patient’s OCD in ...
Read More
Aim: The purpose of this study was comparing executive functions in patient with schizophrenia and obsessive-compulsive disorders with normal individual. Method: The research design was post- facto. The sample of this study included 32 patients with schizophrenia disorders, 31 patient’s OCD in Shahid Lavasani Hospital and 30 participants from normal population. The color-word Stroop test, the N-back test, and the Wisconsin Cards Sorting Test were also used to collect the research data. Data were analyzed using multivariate analysis of variance. Results: The results of this study showed significant differences between the groups in selective attention and in the number of correct responses, so that the normal group had higher scores than patient groups and OCD group achieved higher scores schizophrenic group. In shift attention (completed trials and correct responses) the results showed that the normal group had higher scores that patient groups, and OCDs achieved higher scores than schizophrenics. However, in preservation subscale, the schizophrenic patients were higher than OCD and normal groups. Finally, in working memory, difference between the groups didn’t reach significant. Conclusion: The results of this study revealed higher attention deficits in schizophrenia and OCD patients in comparison to normal controls. Furthermore, schizophrenics had poorer function on selective and shifting attention than OCD patients.
mosayeb Yaarmohammadi vasel; ahad ahadi; khosro rashid; rozita amani
Abstract
Aim: The purpose of this study was to evaluate the effect of Trancranial Direct Current Stimulation(TDCS) on reducing positive and negative symptoms in chronic schizophrenia. Method: The method of this study was quasi-experimental with ABA design. The statistical population was all people with chronic ...
Read More
Aim: The purpose of this study was to evaluate the effect of Trancranial Direct Current Stimulation(TDCS) on reducing positive and negative symptoms in chronic schizophrenia. Method: The method of this study was quasi-experimental with ABA design. The statistical population was all people with chronic schizophrenia who were admitted to the Fouman Patient Psychiatric Treatment Center. Purposeful and accessible sampling method was used among which 4 people were selected randomly. To collect statistical data research of Positive and Negative Symptoms inventory and transcranial Direct Current Stimulation Instrument(TDCS) has been used. Findings: The results showed that anodic tDCS application on the left dorsolateral prefrontal cortex(DLPFC) had a positive effect on decreasing positive, negative, and depression symptoms in people with schizophrenia disorder. Conclusions: In general, it can be said that was effective transcranial Direct Current Stimulation(TDCS) in reducing the symptoms of schizophrenia, so this method can be used in the treatment of people with chronic schizophrenia disorder.
Gholamreza Chalabianloo; mahsa meghrazi; Zahra Keshtgar
Abstract
Aim: Schizophrenia is one of the most prevalent severe psychiatric disorders that including variety of cognitive, emotional & behavioral symptoms in which formal thought problem is one of the determinant factors of prognosis. The aim of the study was comparison of cortical activities in schizophrenic ...
Read More
Aim: Schizophrenia is one of the most prevalent severe psychiatric disorders that including variety of cognitive, emotional & behavioral symptoms in which formal thought problem is one of the determinant factors of prognosis. The aim of the study was comparison of cortical activities in schizophrenic patients with & without formal thought. Method: 60 schizophrenic patients(31 patients with formal thought disorder & 29 patients without formal thought disorder) were selected by goal oriented sampling procedure based on including & excluding criteria. Cortical activities of all participants recorded by 19 channels EEG. Findings: Data showed to schizophrenics without formal thought disorders, the absolute power of delta & beta bands were lower & theta band was higher in patients with formal thought disorder in anterior regions. Also, patients with formal thought disorder revealed decreased absolute power in delta, alpha & beta bands in posterior regions. Conclusion: Our results are in favor of hypofrontality hypothesis of schizophrenia & indicated that patients with formal thought disorder, had cortical hypo arousal that result in severe cognitive problems.
Ahmad Alipour; Samira Hasan zadeh pashang; Afshin Saberi
Volume 2, Issue 4 , June 2017, , Pages 9-30
Abstract
Introduction: Since cognitive defects have an effective role in the life of people with bipolar and schizophrenia disorders, the current research mainly aimed at comparing the status of executive functions and attention of the patients affected by schizophrenia and acute and chronic bipolar disorder ...
Read More
Introduction: Since cognitive defects have an effective role in the life of people with bipolar and schizophrenia disorders, the current research mainly aimed at comparing the status of executive functions and attention of the patients affected by schizophrenia and acute and chronic bipolar disorder type I .It also aimed at comparing their functions with a normal group. Method: This study is a descriptive-comparative study thorough which the executive functions have been compared among five groups. The statistical population consists of all outpatient and inpatient patients affected with acute and chronic schizophrenia and acute and chronic bipolar type I in the manic episode who had referred to the Psychiatry Clinic of Shafa, Rasht. The participants were selected through convenience sampling within 2014-2015 and 60 male patients were selected. Age range of the subjects was 16-50 and they were paralleled in variables of gender, age, and education levels in the groups. Stroop Test and Tower of London Test were administered to all subjects in individual sessions and finally, data were analyzed via using Multivariate Analysis Test and Tukey Follow-up Tests. Findings: Results indicated that there is generally a significant difference (p≤ 0.05) between the groups with acute and chronic schizophrenia, acute and chronic bipolar disorder sufferers in the manic episode with normal people in Wisconsin Card Sorting Test and Continuous Performance Test. Conclusion: Schizophrenic patients had weaker executive function and attention disorder than the Bipolar disorder I patients and normal subjective. And chronicity had a great effect on executive function and attention disorder among the patients.
Gholam Hossein Javanmard
Volume 1, Issue 2 , December 2015, , Pages 7-16
Abstract
Introduction: This research sets out to study executive functions in the schizophrenic patients with negative and positive symptoms and a healthy group on the Wisconsin Card Sorting Test (WCST), as an index of frontal lobe functions. Method: For this purpose, 32 healthy people and 32 schizophrenic patients ...
Read More
Introduction: This research sets out to study executive functions in the schizophrenic patients with negative and positive symptoms and a healthy group on the Wisconsin Card Sorting Test (WCST), as an index of frontal lobe functions. Method: For this purpose, 32 healthy people and 32 schizophrenic patients was selected the Scale for Assessment of Negative Symptoms (SANS) and Scale for Assessment of Positive Symptoms (SAPS) were carried out on schizophrenic patients. Results of these scales indicated that 14 patients had negative and 18 patients had positive symptoms. WCST were administrated for the samples. Data were analyzed by MANOVA. Findings: results indicated that groups had significant differences in all five scales (Eta square=0/401, P=0/001, F (2, 61) =5/38). Groups in number of categories scale (P
