Relationship between social behaviour of nursery school children and spacial social aspects of their environment nr. of rooms at home / nr. of family members / private room for child / play area in neighbourhood / biographical questionnaire for mother / socio-economic description of family / personality characteristics child ( scaling ) / child rearing: planning, stimulating, rules: social behaviour, material use, day schedule / authority in family / control: timing, method, frequency, consistence / 'love, hate' / interest, nourishment, contentment with child, support / social behaviour of child: friendly, unfriendly, withdrawn. Background variables: basic characteristics/ housing situation/ household characteristics/ characteristics of parental family/household/ occupation/employment/ social class