The Brain

The Brain is topic 1.4 of AP Psychology, inside Biological Bases of Behavior. This page works through three real practice questions on it, with the full reasoning behind each credited answer.

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65 questionsConcept Application100% with a figure
Worked examples

Three real the brain questions

From the practice pool, not the mock papers — each with the reasoning that produces the answer.

65 practice questions sit on this single topic — enough that it is worth working through by topic rather than meeting it scattered through a unit review.

100% of them come with a figure. Reading the graph or diagram correctly is most of the work here before any content knowledge applies.

Concept Application · with figure

A patient can understand speech and knows what she wants to say, but her spoken sentences are slow and effortful after damage near the left frontal lobe. Which interpretation is most appropriate?

  1. ASpeech-production damage can impair fluency while sparing comprehension.correct
  2. BDamage to the occipital cortex directly prevents the retina from detecting light.
  3. CDamage to the cerebellum eliminates the need for balance and coordination.
  4. DDamage to the endocrine system causes neurons to stop using electrical signals.
Why A is correct

The symptom pattern points to speech production rather than primary vision, coordination, or hormones.

brain localization explains the evidence in "A patient can understand speech and knows what she wants to say, but her spoken sentences are slow and...". The credited option, "Damage to a speech-production area can disrupt fluent expression while leaving comprehension...", is supported because Effortful speech with preserved comprehension is consistent with disruption of speech production. "Damage to the cerebellum eliminates the need for balance and coordination" is a real-looking alternative, but The cerebellum supports coordination but does not eliminate the need for it; "Damage to the endocrine system causes neurons to stop using electrical signals" also fails because The endocrine system is hormonal and does not stop neurons from using electrical signaling. The aim is to connect the concrete evidence to the psychological mechanism, then reject choices that shift the process, time frame, or research logic away from the scenario pattern.

Concept Application · with figure

A person can point with the left hand to a key shown only on the left side of vision but cannot say the object's name aloud. Which explanation best fits?

  1. ACerebellar damage
  2. BParasympathetic rebound
  3. CPlacebo response
  4. DRight hemisphere with limited speech accesscorrect
Why D is correct

The response pattern is consistent with separated hemispheric processing.

"A person can detail with the left hand to a key shown only on the left side of vision but cannot say the..." details toward brain localization, not just a familiar Biological Bases of Behavior label. The credited option, "Right-hemisphere response", is supported because Information from the left visual field is processed first in the right hemisphere, which typically has limited language production access after split-brain surgery. "Cerebellar damage" is a real-looking alternative, but The issue is not movement coordination; "Parasympathetic rebound" also fails because The scenario is about lateralized information, not autonomic calming. The aim is to connect the concrete evidence to the psychological mechanism, then reject choices that shift the process, time frame, or research logic away from the scenario pattern.

Research Methods and Design · with figure

To study a small brain area, researchers temporarily disrupt that area and compare behavior before and after the disruption. What method is being used?

  1. ARandom sampling
  2. BLesion approachcorrect
  3. CNaturalistic observation
  4. DContent validity
Why B is correct

The method infers function by changing activity in a region.

The Brain reasoning here starts with "To study a small brain area, researchers temporarily disrupt that area and compare behavior before and..." and asks what mechanism fits. The credited option, "Lesion approach", is supported because Disrupting or damaging a brain area and observing behavior helps infer function. "Content validity" is a real-looking alternative, but That concerns whether a test samples the intended domain; "Random sampling" also fails because The stem describes a manipulation of a brain region, not population selection. The aim is to connect the concrete evidence to the psychological mechanism, then reject choices that shift the process, time frame, or research logic away from the scenario pattern.

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Last reviewed 2026-08-28. Topic and unit names follow the College Board course framework. Question counts describe the PrepScore practice bank, not the exam.
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