The Alex Studies: Cognitive and Communicative Abilities of Grey Parrots

By I. Pepperberg. 2000

519 citations recorded by the source corpus.

Subfields: Developmental and Educational Psychology

View Paper: https://www.semanticscholar.org/paper/a90905af23921baddc4fbce60aef5ffe8e212ece

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In Developmental and Educational Psychology

Citations in the corpus

Selection for and against vocal learning in birds and mammals (2006, background): “While not as prolific, some parrots, corvid songbirds, and mockingbirds can produce hundreds to thousands of calls and/or learned warble/song combinations (Derrickson & Breitwisch 1992; Farabaugh et al. 1992; Boarman & Heinrich 1999; Pepperberg 1999).”
Developmental differences are correlated with relative brain size in birds: a comparative analysis (2003, background): “Because many bird species exhibit behaviours that are socially learned during posthatching development (e.g., Curio 1988; Lefebvre and Palameta 1988; Mason 1988; Heinsohn 1991; Pepperberg 1999), posthatching growth may also be related to relative brain size (Wyles et al.”
A case of quick problem solving in birds: string pulling in keas, Nestor notabilis (2006, background): “Marler (1996) and later Emery & Clayton (2004) have suggested similar selection processes for birds, and Pepperberg (1999) added emphasis on the combination of intelligence and advanced communication skills in parrots.”
Testing Problem Solving in Ravens: String-Pulling to Reach Food (2005, background): “Corvids are, next to parrots (Pepperberg 1999), especially well known for both excellent beak–foot coordination (e.g. Gwinner 1966; Hunt 1996) and cognitive skills (e.g. Kamil & Balda 1985; Clayton & Dickinson 1998; Weir et al. 2002).”
The semiotic hierarchy: life, consciousness, signs and language (2009, unknown): “…or another kind of protolanguage, when especially “enculturated” in a human environment: chimpanzees and bonobos (SavageRumbaugh et al. 1998), gorillas (Patterson 1980), orangutans (Miles 1990), dolphins (Herman 2005), dogs (Kaminski, Call & Fischer 2004) and even grey parrots (Pepperberg 2000).”
Cognitive ability and awareness in domestic animals and decisions about obligations to animals (2010, background): “Elliker also found, using computer modified photographs, that it was the ear position that was the main feature used by the sheep to make this distinction, rather than eye features.”