Compared Intelligence Ability to the Third Grade Girls in a City of Bandar Abbas on the Sequence of Birth and Number of Children

The aim of this study is to evaluate the ability of intelligence third grade female students by controlling the sequence of birth and family size is variable. The research method is causal-comparative. The target population included all third grade female students in Bandar Abbas in the area of a school year 2014-2015, 135 people have formed, that the research sample by sample size table Gerjesy and Morgan (1970), 100 students were selected by purposive sampling the community. Results using independent t-test and analysis of variance were significant and include: 1. Average intelligence is the ability of children with the birth of the first, the second and third higher than the average intelligence of children with second-third higher. 2. The mean intelligence to children in families with one child, the children of two children and three children later, the average intelligence of the children in the family of three children in a family with two children is higher. 3-average scores of intelligence of children with parents with higher education (bachelor-up group) compared to other groups (elementary cycle, diploma and associate degree) higher. 4-The average scores of intelligence employees are parents of children with parents with higher self-employed and mother is a housewife.