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. Author manuscript; available in PMC: 2013 Aug 30.
Published in final edited form as: Hum Evol. 1988 Feb 1;3(1-2):45–64. doi: 10.1007/BF02436590

TABLE 2.

Correlations Between the Age of Solution of Object-Permanence and Means-Ends Tasks and the Acquisition of Disappearance and Success/Failure Words.

Disappearance
Words		 Means-Ends Success/Failure
Words
Object-permanence .70 ** .37 .46 *
Disappearance words .23 .26
Means-ends .95**
*

p < 0.05.

**

p < 0.001.