the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...

Objective: This study aimed to determine the effectiveness of cognitive-behavioral coping skills training and mindfulness-based relapse prevention program in the improvement of treatment motivation among drug dependent individuals. Method: An experimental research design along with pretest-posttest control group was used in this study. The drug dependent individuals who referred to drug addicti...

Sleep is one of the most important processes of circadian cycles that play a major role in mental and physical health, especially during adolescence. The purpose of the present study was to predict the quality of sleep in students based on anxiety sensitivity, Internet addiction, and mindfulness. The present study is descriptive research in terms of purpose and correlational in terms of method....

based on the latest records of typhlops vermicularis merrem, 1820 from iran, this species is distributed in the northern and southern regions of the country. in this study, new records of typhlops vermicularis are presented and it is shown that distribution range of this species is extended towards the eastern and western iran, and according to the new distribution map, it can be assumed that t...

The present study aimed to examine the moderating effect of mindfulness on the relationship between ego strength and assertiveness. The statistical population of the present study included all students of Tehran University in 2018. The statistical sample was Three hundred and one students who were selected by the cluster sampling method. All participants were asked to complete the Rathus Assert...

one very decisive factor in students’ academic destiny is the result they get at final term examinations. because of its importance, both students and teachers are curiously anxious about them. as normally it is the case, these final term tests are prepared hurriedly in short time by teachers which result in students’ dissatisfaction, complaining on how the test was different from their expecta...

abstract this study evaluated and compared medical terminology and english for the students of medicine (ii) as two representatives of the textbooks available on the iranian market for teaching english to the students of medicine. this research was performed on the basis of a teacher’s and a number of students’ attitudes and the students’ needs analysis for two reasons: first, to investigate...