PSYC 3420 Chapter Notes - Chapter 4: Facial Symmetry, Casual Sex, Parental Investment

• School: York University
• Department: Psychology
• Course: PSYC 3420
• Professor: Irwin Silverman

Document Summary

Weavbird too chooses by making the male impress by singing, showing nest. Theoretical background for the evolution of mate preferences: parental investment and sexual selection: Form with another gamete to form a zygote-i. e. fertilized gamete. Men have 12 mill sperm /hr; women 400 ova. Women"s greater initial investment- birth, breastfeeding, lasting up to 4 yrs. Pipefish seahorse, mormon cricket, panamanian frog invest more male. Females usually go through gestation and fertilization. Selection favoured women who valued their resources and were choosy. Sex that invest more will be more discriminating. Sex that invests less will be more competitive within: mate preferences as evolved psychological mechanisms: Selection would have favored being generous rather than stingy. Choosier women out-reproduced other women who weren"t choosy. Preferences do change, but potential and future are promising. Some attributes weigh more; susceptible to deceit. See 4. 1 110 copy: preference for economic resources: Shrikes gather items put on thorns; females choose larges caches.