1.

1). Vaguely2). Credibly3). Accurate4). Accurately

Answer»

The blank (E) requires an adverb. This eliminates option 3 as the word accurate is an adjective.

Let us LOOK into the meaning of the words:

Vaguely – unclear, roughly

Credibly – able to be trusted or believed.

Supposedly – assumed as true regardless of the facts

Accurately – CORRECTLY

The word accurately is the best among all the OPTIONS as this fits in the context very well. The psychologists describe a behaviour as exactly / correctly / accurately as possible so that a particular behaviour can be distinguished from the other behaviours.



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