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up our device so that each time the
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up our device so that each time the
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up our device so that each time the
infant squeezes it they have to squeeze
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infant squeezes it they have to squeeze
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infant squeezes it they have to squeeze
harder to get old McDonald to play and
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harder to get old McDonald to play and
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harder to get old McDonald to play and
of course they want old McDonald to play
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of course they want old McDonald to play
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of course they want old McDonald to play
right so they're motivated to keep doing
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right so they're motivated to keep doing
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right so they're motivated to keep doing
that so that's how we record infants
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that so that's how we record infants
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that so that's how we record infants
maximum grip strength we like
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maximum grip strength we like
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maximum grip strength we like
essentially keep going as long as
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essentially keep going as long as
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essentially keep going as long as
infants will allow us to do that
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infants will allow us to do that
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infants will allow us to do that
basically there are some other things
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basically there are some other things
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basically there are some other things
that we measured we measured infant's
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that we measured we measured infant's
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that we measured we measured infant's
weight our motivation for doing this is
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weight our motivation for doing this is
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weight our motivation for doing this is
that an adult's strength and weight are
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that an adult's strength and weight are