Why do Visual Puzzles and Figure Weights have strict time limits, and Matrix Reasoning only has a 30 second guideline?
Similar to Block Design, higher ability examinees tend to perform Visual Puzzles and Figure Weights items more quickly. Given enough time, low ability examinees can eventually respond to items correctly. This is not the case with Matrix Reasoning. The 30 second guideline was established because completion time data indicated that the vast majority of examinees who will respond correctly do so within 30 seconds, but giving additional time to low ability examinees did not result in correct scores. A strict time limit is therefore unnecessary: Grant additional time if the examinee has established a pattern of providing delayed but correct responses as the item difficulty increases.
