RESEARCH_FILE
Frances Fuchs Schachter
Fordham University
Known for:Originating sibling deidentification theory — how siblings exaggerate differences from each other to reduce rivalry
SEE THE PRACTICE
Turn a thought this research explains into one clear move.
THE THOUGHT
“I came second in my own family”
YOUR RECORDED RESPONSE
“This ranking is their perceptual habit, not my permanent address.”
ONE PRIVATE MOVE
Sit with one recent family interaction where you felt ranked below a sibling. Write down exactly what was said and what you felt. Then reread it and mark which parts are direct quotes and which are your conclusion. Notice the gap.
Key findings
- 1976
Surveying undergraduates from two- and three-child families, deidentification — perceived and cultivated dissimilarity — was most pronounced between siblings adjacent in birth order and close in age. Sibling Deidentification ↗
- 1978
Cross-validating the 1976 self-report findings with mothers' judgments of young children (average age about 6.4 years), the study confirmed higher deidentification between adjacent sibling pairs, with levels stabilizing after early childhood. Sibling Deidentification Judged by Mothers: Cross-Validation and Developmental Studies ↗