memory function

This research was conducted with the aim of investigating the effect of sleep deprivation on memory function in the morning sleep type of girls students in the dormitory of Kermanshah City. The current research is a semi-experimental type with a pre-test-post-test design and a control group. The current research population includes all female students of the dormitory in the academic year of 2019. The initial research sample consisted of 200 female dormitory students who were selected through available sampling. The research tools include the Wechsler Memory Scale (WMS;Wechsler; 1939) and the Morning-Evening Questionnaire (MEQ; Horn; & Östberg, 1976).  The covariance analysis of the data showed that there is a significant difference in the memory performance variable between the experimental and control groups (P<0.01). Considering that the average of the experimental group compared to the control group had an effect on the dependent variable; sleep deprivation has an effect on memory functions in the morning sleep type. The results showed that sleep deprivation causes impairment in memory functions and weak memory function; so it can be concluded that sleep deprivation has led to a decrease in memory function.

In many of heart patients coronary artery bypass surgery is the best choice for treatment. Two types of techniques are used in this type of surgery. one of them is on- pump surgery another is off-pump surgery. based on some studies , patients experience some complications after surgery, including: depression, anxiety and decreases in cognitive functions. in this study, patient's psychological well-being and memory function which is one of cognitive functions are described before and after surgery in two groups. descriptive- comparative method is used. total, of 68 patients participated in this study, at first one day before and then two months after surgery were evaluated. depression, anxiety and stress scale (DASS-21) and also, wechsler memory scale (WMS-R) are used. results showed that patients in both groups had similar preoperative psychological well-being. the groups showed differences in memory function, on-pump group showed significant decreases in memory function after surgery(p<0/001). according to these results should consider some interventions to improve memory function and psychological well-being of cardiac patients for preventing of cardiovascular disease recurrence.

Cognitive deficits and Memory disfunctions cause low self-esteem and feeling of incapability in individual and social life in the elderly. Unfortunately, caring of the aged people in Iran is mostly based on physical care. The main aim of the present research was to study the efficacy of cognitive rehabilitation on mental state and memory functions as a non-pharmacological intervention to decrease cognitive impairments in the erderly with mild Alzheimer’s. The research method of this study was experimental with pretest-posttest designs. Statistical population was all the elderly with mild Alzheimer’s disease who were living in residential care homes in Shemiranat area in Tehran province. The sample included 40 people who met the inclusion criteria of this study, and were selected through available sampling. The participants were assigned in the experimental group (20 patients) and control group (20 patients) by random assignment technique who were matched by education. Data were collected by Mini-Mental State Examination (MMSE) and Wechsler Memory Scale Questionnaire (WMS-Q). The data were analyzed through Analysis of Covariance. The results showed that scores on both tests, (MMSE) and (WMS-Q) were significantly different, with higher indices in the intervention group. Based on these findings, it can be concluded that cognitive rehabilitation technique can be useful for repairing cognitive impairments in the elderly with Alzheime’s disease and it is anticipated that quality of their individual and social lives will be improved.

The purpose of this study was to determine the effects of stress on memory function according to the mediatory effects of personality construct, hardiness. The design was Quasi-experimental with post-test and control groups. The study sample included 60 male and female undergraduate students from Tabriz University which were selected through field-scale screening for the Personal Views Survey 30 persons obtained high hardiness and 30 persons remained get low. Each of these two groups were divided into two types: Experimental and Control; so that four groups were created: Experimental with high hardiness, Experiment with low hardiness, Control with high hardiness & Control with low hardiness. The four groups were compared in terms of overall score and sub-scales scores of Wechsler Memory Scale. Hypotheses and research questions were tested through one-way analysis of variance, multivariate and post-hoc tests. Analysis showed that in the main hypothesis, there is no significant difference between experimental with high hardiness and experimental with low hardiness in terms of total memory score. Neither is significant difference between experimental and control groups with high hardiness, nor any significant difference between experimental & control groups with low hardiness in terms of total memory score. But all groups of study were significantly different in case of two sub-scales scores: digit repeating and orientation.