Language learning ability is nature or nurture?
Gardner & Gardner's case study on Washoe.
Training methods used (IV): Imitation, shaping & reinforcement reward-tickling
3 observers, a sign had to appear at least once a day over a period of 15 consecutive days to be counted.
After 22 months, 30 signs had been learned (DV),
showed differentiation, transfer and combination,
demonstrated semanticity, generalisation, displacement and creaticity,
but structure-dependence.
Human Vs non-human animals ethical issues
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