Final answer:
The claim that search is easier when the target lacks a feature compared to distractors is false. It's usually more straightforward to identify a target by unique characteristics that stand out from distractors. In animal population studies, such aspects can influence population estimates.
Step-by-step explanation:
The statement that search is easier when the target is defined by not having a feature compared to distractors is false. In search and detection tasks, it is typically easier to identify a target when it possesses a unique feature that distinguishes it from the surrounding distractors. When a target lacks a feature that is present in distractors, it can be more challenging to identify because it does not stand out and can be easily overlooked.
Considering animal population studies, an underestimate can occur if animals learn to seek out bait, as mentioned. They might avoid traps or areas where they have been captured before, leading to a lower capture rate, which can affect the accuracy of the population estimate.
Overall, defining search targets by distinct characteristics generally facilitates quicker and more accurate detection.