Objective: The aim of the present study was to investigate the features of the Family-Focused Intervention Scale (FFIS) for mothers of children with special needs.

Materials & Methods: Descriptive-survey and validation research methods’ were applied for the survey. Participants were drawn from a sample of 200 mothers of/with children with special needs in were selected from the special schools by selected based on the in-reach sampling. The Family-Focused Intervention Scale (FFIS) were used as measurements instrument. To assess the results of the study, the statistical package for social sciences (SPSS) version 16 was used for computing correlations, reliability coefficients (Cronbach’s &alpha), test-retest reliability, and item-total correlation and factor analysis.

Results: Test of the internal consistency of the Family-Focused Intervention Scale (FFIS) revealed that all 40 items were highly correlated with the total score. The Cronbach’s alpha for the scale was 0. 83. A re-administration of the measure 1 month later yielded high correlation. Item-total correlation was in acceptable range for items (P<0. 001). The Pearson’s correlation coefficient between the subscales and total score were (r=0. 11-0. 64) respectively. Factor analysis extracted five factors including System engagement, Child information, Family instructional activities, Personal-Family assistance and Resource assistance, with a value of greater than one exhibited 55. 82% of the total variance.

Conclusion: The results of this study indicate that measuring the Persian version of the FFIS appeared to be credible with high stability for assessing intervention programs. The findings of the present research give support to the significant value of this questionnaire for future studies.