Siblings’ relationships have been seen as determinants of emotional and personal development. Although Greece is assumed a country with strong family bonds there is not empirical research in this area. Similarly Ireland is traditionally viewed as a country with strong family values.

In an attempt to conduct a comparative study of siblings’ relations the lack of a Greek valid instrument was obvious. The Sibling Relationship Questionnaire (SRQ) is a widely used scale which is a self reported measurement of this relationship.

Thus, in an attempt to employ an easily administered and valid measure, to assess sibling relationships, but also to be able to compare the results across countries the SRQ was the scale of choice.

The concurrent validity ranged from 0.29 to 0.68, the overall internal consistency (Cronbach's alpha) was equal to 0.86 and the test-retest reliability (Spearman's rho) ranged from 0.58 to 0.78. Agreement between children-parents versions was significant only when mothers do the rating.

Thus it seems that the translated Greek version of SRQ is a valid and reliable instrument to be used in the measurement of sibling relationships in Greek population, and can be used as a measurement for multinational clinical research and comparison with findings from other countries.