Questions: According to Schneider and Shiffrin (1977), participants were utilizing attentional processes in the consistent mapping condition and were utilizing attentional processes in the varied mapping condition of their experiments on the nature of divided attention. automatic; controlled controlled; automatic algorithmic, heuristic heuristic; algorithmic

The answer is: automatic; controlled

Explanation for each option:

1. automatic; controlled: This is the correct answer. According to Schneider and Shiffrin (1977), in the consistent mapping condition, participants were able to develop automatic processing because the targets and distractors were consistently different. This allowed them to perform the task with little conscious effort. In the varied mapping condition, the targets and distractors could change roles, requiring participants to use controlled processing, which is more effortful and requires conscious attention.

2. controlled; automatic: This is incorrect. Controlled processing is used in the varied mapping condition, not the consistent mapping condition. Automatic processing is used in the consistent mapping condition.

3. algorithmic; heuristic: This is incorrect. The terms "algorithmic" and "heuristic" are not used by Schneider and Shiffrin in their 1977 study on divided attention. These terms are more commonly associated with problem-solving and decision-making processes.

4. heuristic; algorithmic: This is incorrect for the same reason as the previous option. The study by Schneider and Shiffrin does not use these terms to describe attentional processes.

In summary, Schneider and Shiffrin's (1977) study demonstrated that participants used automatic processing in the consistent mapping condition and controlled processing in the varied mapping condition.