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had proposed/proposed

 

What is the difference between:

1) Morton & Johnson had proposed that infants' attraction to faces was initially very basic form of …

2) Morton & Johnson proposed that infants' …

Such questions have to be shown in the context.
It cannot be told from the sentences as such.

hmm nevim jestli to teda pomuze, cela veta/context:

1)faces are interesting stimuli
2)targets are pre-programmed

Morton & Johnson had proposed that infants' attraction to faces was initially very basic form of (2) above, and non-specific;i.e. Infants are born with a sub-cortically mediated system (‚conspec‘) which causes them to attend to faces.

Ja nechapu proc tam je to „had proposed“, ja bych dala just „proposed“. Vzdycky pisu proposed. Nekdy zase je napsano „it has been proposed“ or „it was proposed“. Porad v tom hledam nejaky cesky equivalent nebo logiku. Je tam vubec?

 

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