Two- and three-year-olds track a single meaning during word learning: Evidence for Propose-but-verify.
A child word-learning experiment is reported that examines 2- and 3-year-olds' ability to learn the meanings of novel words across multiple, referentially ambiguous, word occurrences. Children were told they were going on an animal safari in which they would learn the names of unfamiliar animals. Critical trial sequences began with hearing a novel word (e.g., "I see a dax! Point to the dax!") while seeing photos of two unfamiliar animals. After responding and performing on two filler trials with known animals, participants encountered the novel word again ("I see another dax! Point to the dax!") in one of two experimental conditions. In the Same condition, participants saw the animal they pointed to previously when hearing "dax" alongside another unfamiliar animal that had been seen before but not paired with "dax". In the Switch condition, participants saw the animal they had not pointed to previously alongside the unfamiliar animal. Children were well above chance on Same trials, but at chance on Switch trials. Thus, although children could remember a previously selected referent and use it to inform later referent selection (Same condition), a potential referent that was not previously selected and merely co-occurred with the target word (Switch condition) was either not remembered, or simply deemed irrelevant to word meaning. This finding suggests young children do not store multiple possible meanings from a single word occurrence, but rather restrict learning to what they deemed to be the unique referent of the novel word in the moment, testing that word-meaning hypothesis on the next occurrence.
Department of Psychology, University of Pennsylvania, 3720 Walnut Street, Solomon Lab Bldg., Philadelphia, PA, 19104-6241.
Kristina
K
Woodard
Department of Psychology, University of Pennsylvania, 3720 Walnut Street, Solomon Lab Bldg., Philadelphia, PA, 19104-6241.
Lila R
LR
Gleitman
Department of Psychology, University of Pennsylvania, 3720 Walnut Street, Solomon Lab Bldg., Philadelphia, PA, 19104-6241.
John C
JC
Trueswell
cross-situational word learning; fast mapping; propose-but-verify; statistical learning
Cogn Psychol. 2013 Feb;66(1):126-56
23142693
Psychol Rev. 2012 Jan;119(1):21-39
22229490
Proc Natl Acad Sci U S A. 2011 May 31;108(22):9014-9
21576483
Cognition. 1999 Dec 7;73(2):135-76
10580161
J Child Lang. 1993 Jun;20(2):395-418
8376476
Proc Natl Acad Sci U S A. 2012 Feb 28;109(9):3253-8
22331874
Psychol Sci. 2007 May;18(5):414-20
17576281
Psychol Rev. 1996 Oct;103(4):650-69
8888650
Trends Cogn Sci. 2014 Oct;18(10):497-500
25001609
Cognition. 1996 Oct-Nov;61(1-2):39-91
8990968
Psychol Sci. 2007 Jan;18(1):79-87
17362382
Cogn Sci. 2017 Apr;41 Suppl 4:638-676
27666335
J Exp Psychol. 1963 Oct;66:409-18
14053258
J Exp Psychol Learn Mem Cogn. 2014 May;40(3):892-903
24417325
Cognition. 2008 Mar;106(3):1558-68
17692305
Trends Cogn Sci. 2009 Jun;13(6):258-63
19447670
Cognition. 2015 Dec;145:53-62
26302052
J Exp Child Psychol. 2011 May;109(1):132-40
21145067
Dev Psychol. 2002 May;38(3):363-75
12005380
Cognition. 2013 Feb;126(2):285-300
23200511