1) They carried out a study of perceptions of temperature.
2) The research group are currently looking into the effects of first language on the recall of childhood experiences.
3) They were finally able to make clear the distinction between learning and acquisition.
4) They put forward a new model for the description of the universe.
5) They fail to take into account a series of contributing factors.
6) I point out several flaws in the methodology.
7) We set out to examine the stripe distribution in tabby cats.
8) We take issue with the statement by Burbrook and colleagues.
