Question

Your text suggests that mental set may impair problem solving mainly during the _________ stage; confirmation bias may impede ________.

Answer 1

Preparation stage for dash one and judgement stage for dash two
 
The mental set is  a term that describes when one is more inclined to solve  particular problems. The preparation stage is rampant with poor problem solving while the in the judgement stage, one tends toward solving problems based on confirmation bias.