Researchers studying spatial cognition observed that laboratory rats trained to navigate a complex maze exhibited a significant increase in slow-wave neural activity during subsequent sleep compared to control rats that spent an equal duration exploring an open, non-navigational field. Concluding that slow-wave sleep specifically functions to consolidate newly acquired spatial maps rather than serving as general neural recovery from physical exertion, the researchers posited that this elevated slow-wave activity is directly driven by spatial learning.
Which of the following are assumptions upon which the argument depends? Select all that apply.
- The physical exertion expended by rats exploring the open field was not significantly less than that expended by rats navigating the complex maze.Answer
- The increase in slow-wave neural activity in the maze-trained rats was not primarily produced by stress or emotional arousal caused by the complex environment.Answer
- CSlow-wave sleep is the only phase of the sleep cycle during which rodents process and consolidate spatial memory.
Answer
The argument depends on the statements regarding physical exertion parity between control groups and the exclusion of environmental stress as the primary driver of slow-wave sleep activity.
The conclusion attributes the increase in slow-wave sleep specifically to spatial map consolidation rather than physical recovery. The statement regarding physical exertion is required because if open-field rats expended far less physical effort, physical fatigue rather than learning could account for the sleep difference. The statement regarding stress is required because if stress produced the neural spike, the learning-consolidation hypothesis is invalidated. Both statements pass the Negation Test.
Step-by-Step Solution
Key Concept
Identifying unstated necessary assumptions using the Negation Test and eliminating alternative causal explanations.