Sex differences in the extent of mate search were investigated using two sequential choice processes. In Study 1, attribute search, prior to choosing a mate or rejecting two competing mates, for either a short-or long-term relationship, was explored. Men (women) seeking short-term relationships were the least (most) likely to reject both suitors. Men acquired a greater number of attributes prior to rejecting mates. The length of the relationship solely affected men's search behaviors. Study 2 utilized a nested sequential model namely participants decided how many suitors to sample prior to choosing a short-term mate, and how many attributes to acquire on each sampled suitor. Women sampled a greater number of suitors prior to choosing a mate. Biological sex was found to be a greater moderator of mate search than were three personality traits linked to search. Across both studies less information was acquired prior to rejecting versus choosing a mate.
Using a twins study paradigm the genetic basis of decision making styles was explored using psychometric scales as well as actual choices. Study 1 compared monozygotic (MZ) and dizygotic (DZ) twins along the General Decision Making Scale (GDMS) and the Maximizing-Satisficing Inventory (MAX). MZ twins exhibited greater similarity than their DZ counterparts in terms of their overall GDMS scores, three of the GDMS subscales, and the MAX inventory. Study 2 measured key information processing metrics of actual choices that individuals made via a computerized informational display board. MZ twins are more similar to one another than DZ twins when it comes to the extent of information search prior to making a choice. There were no differences between the two groups of twins in terms of the selectivity and pattern of searches. The results of the two studies suggest that individuals' decision making styles are in part shaped by their genes.
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