First-year psychology students who either had been breast fed for up to 3 months or never breast fed scored significantly higher on the IPAT Anxiety Scale than those breast fed for longer periods of time. There were no breast feeding effects on the Eysenck Personality Inventory, although females obtained significantly higher neuroticism scores than men. By extending a previous finding these results indicated the need for more data in this area.
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Hughes et al. (1977) studied this question.
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