Shiva Zarezadeh Kheibari; Seyed Amir Amin Yazdi; Shahrbanoo Aali; Hossein kareshki
Abstract
The visuospatial development is one of the most important foundations of development, since it plays the role of the primary function of all learning and communication, and forms the mental representations of the outside world. On the other hand, this development simultaneously contains spatial information ...
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The visuospatial development is one of the most important foundations of development, since it plays the role of the primary function of all learning and communication, and forms the mental representations of the outside world. On the other hand, this development simultaneously contains spatial information and directs all movements in space. Measurement of this development and its various dimensions is vital in the early years of life, since with this information we can estimate the visuospatial capacity of the child and examine the change of this basic capacity during life span. The aim of the present study was to provide psychometric properties for the visuospatial development questionnaire (Harry Wachs, 2014) for use in Iran. A questionnaire was filled out on 348 preschool children in Mashhad that were selected randomly by multistage stratified sampling method and psychometric indices were calculated using statistical software. The findings showed that the questionnaire had a satisfactory content and structure validity and also reliability. The results of the confirmatory factor analysis also showed that the structure of the questionnaire has an acceptable fit with the data. These factors were named in accordance with the main research, body awareness and sense; location of body in space; relation of object to self, other objects and people; conservation of space; Visual-logical reasoning; Representational thought; their coefficients of internal consistency were 0.83, 0.79, 0.67, 0.80, 0.72 and 0.61, respectively. These results show that the Visuopatial development Questionnaire can be used as a tool for measuring the concept of the visuospatial development in Iran.
Ali Delavar
Abstract
Aim:The Aim of this research was studding the psychometric properties of self-handicapping scale as a suitable tool for measuring the self-handicapping.Method:The population was all of Tehran’s university students that 520 people were selected as a sample from the universities of AllamehTabataba’i, ...
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Aim:The Aim of this research was studding the psychometric properties of self-handicapping scale as a suitable tool for measuring the self-handicapping.Method:The population was all of Tehran’s university students that 520 people were selected as a sample from the universities of AllamehTabataba’i, Tehran, south branch of Payam-e-Noor & south branch of Islamic Azad University in various fields through purposive sampling. The research tool wasself-handicapping scale (Jones, &Rhodewalt 1982).For studding the psychometric properties of self-handicapping was determined the content validity, construct validity and reliability of this scale.Results:The content validity of this scale was confirmed by 5specialists. In exploratory factor analyze supported three factor solution. Confirmatory factor analysis results indicated that the three-factor model fit the data. Internal consistency of the factors and scale was quite high and also item analysis showed high internal consistency between the items and scale. The reliability of scale was obtained 0.918 using the Cronbach'salpha method and 0.767 using the spilt-half method. Conclusion:Self-handicapping scale has good psychometric properties for college Students. Reliability of this scale was very high and Three-factor model proposed in the research has good construct validity and Helps researchers that can using this instrument for measuring the self-handicapping in the college students.
