Final answer:
The study by Andrade on doodling has strengths such as internal consistency and ecological validity, but weaknesses including potentially low test-retest reliability and selection bias that may impact generalizability.
Step-by-step explanation:
Evaluating the study by Andrade on doodling in terms of strengths and weaknesses, particularly concerning its reliability, we identify that one strength is the study's internal consistency. Due to the controlled environment and standardized instructions, participants likely received similar stimuli, which promotes reliability. A second strength could be the study's ecological validity since doodling is a common, real-world task that does not require an artificial setting. However, one weakness is that the study may suffer from limited test-retest reliability as it is unclear whether repeated administrations would yield consistent results. Additionally, because the sample consisted solely of participants who had chosen to listen to a boring phone call, there may be a selection bias, limiting the generalizability of the findings.