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# In landmark psychological studies of the 1920's, Jean Piaget observes

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Joined: 08 Jun 2013
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In landmark psychological studies of the 1920's, Jean Piaget observes  [#permalink]

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09 Oct 2018, 08:58
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Difficulty:

5% (low)

Question Stats:

84% (00:49) correct 16% (01:05) wrong based on 60 sessions

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In landmark psychological studies of the 1920's, Jean Piaget observes the behavioral repertoires of his own children to further his understanding of the development of knowledge.

a) observes the behavioral repertoires of his own children
b) observed the behavioral repertoires of his own children
c) observes the behavioral repertoires performed by his own children
d) observes behaviors by his own children
e) observes the performance of his own children's behavior

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Re: In landmark psychological studies of the 1920's, Jean Piaget observes  [#permalink]

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09 Oct 2018, 09:06
Harshgmat wrote:
In landmark psychological studies of the 1920's, Jean Piaget observes the behavioral repertoires of his own children to further his understanding of the development of knowledge.

a) observes the behavioral repertoires of his own children
b) observed the behavioral repertoires of his own children
c) observes the behavioral repertoires performed by his own children
d) observes behaviors by his own children
e) observes the performance of his own children's behavior

Must be (B) for correct Tense Usage, errors in other options highlighted in RED.
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Re: In landmark psychological studies of the 1920's, Jean Piaget observes   [#permalink] 09 Oct 2018, 09:06
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