AP Psychology Unit 3 practice questions
Try 10 multiple-choice questions from Unit 3 here. Pick an answer to see why it's right or wrong, then take the timed test above for a full AP-style set.
Question 1
Source:Adapted from Developmental science. Bridgett et al. (2019). Contributions of mothers' and fathers' parenting to children's self-regulation: Evidence from an adoption study.
Researchers recruited 361 families who had adopted children at birth to examine how parenting influences children's ability to control their thoughts and behavior, known as self-regulation. When the adopted children were 27 months old, researchers observed and rated both adoptive mothers' and fathers' harsh and negative parenting behaviors. The biological mothers of the adopted children completed questionnaires measuring their own self-regulation abilities when the children were 54 months old. Researchers then assessed the adopted children's self-regulation at 54 months and again at 72 months of age using standardized tasks and parent reports. Because adoptive parents share no genetic material with their adopted children, this design allowed researchers to separate the effects of parenting from inherited genetic influences.
Group Mean Self-Regulation Score at 54 Months Mean Self-Regulation Score at 72 Months Children with low harsh parenting from both parents 4.8 5.4 Children with high harsh parenting from one or both parents 3.6 4.1 Biological mothers (for comparison) 5.2 — Based on the methodology described, which of the following best categorizes the researchers' approach to studying the adopted children?
Longitudinal correlational design, as variables were measured repeatedly over time without direct manipulation.
Cross-sectional experimental design, as multiple age groups were compared under highly controlled conditions.
Quasi-experimental design, as researchers randomly assigned the adopted children to specific parenting conditions.
Naturalistic observation design, as researchers recorded the children's behaviors exclusively in uncontrolled environments.
Show answer
Answer: (A)
Methodological analysis reveals the study tracks the same subjects over multiple years (longitudinal) without manipulating the independent variable of parenting style (correlational), relying instead on observing naturally occurring differences.
Question 2
A developmental psychologist studies stability and change in personality by administering the Big Five personality inventory to 150 college students in their first semester and again in their senior year. She finds moderate correlations (r = 0.58 to 0.71) between personality scores across the four-year period and concludes that personality traits remain relatively stable from early to late adulthood. Which design limitation most threatens the validity of this conclusion?
The study measures only college students, limiting external validity and preventing generalization of stability patterns to the full lifespan or non-college populations.
The study measures only college students, limiting external validity and preventing generalization of stability patterns to early childhood and adolescent populations.
The study measures only college students, limiting construct validity and preventing generalization of stability patterns to the full lifespan or non-college populations.
The study uses the Big Five personality inventory, limiting external validity and preventing generalization of stability patterns to the full lifespan or non-college populations.
Show answer
Answer: (A)
Because the sample consists only of college students followed from age 18 to about 22, the results cannot be generalized beyond this narrow age range and population, which limits external validity and undermines the claim about stability across the full lifespan.
Question 3
A developmental researcher examines stability and change in attachment style by conducting semi-structured interviews with 25 adults about their childhood relationships with parents and current romantic relationships. She codes interviews for secure, anxious, and avoidant attachment patterns and finds that 68% of participants show the same attachment style in both contexts. She concludes that attachment style remains stable from childhood through adulthood. Which aspect of the study's design most threatens construct validity?
The retrospective self-report of childhood attachment relies on adult memory, which may be inaccurate or reconstructed based on current attachment experiences.
The retrospective self-report of childhood attachment is subject to social desirability bias, where participants may describe idealized attachment patterns that do not reflect actual childhood experiences.
The coding scheme for attachment patterns may not validly distinguish between secure, anxious, and avoidant styles, leading to misclassification of participants' actual attachment experiences.
The retrospective self-report of current romantic relationships relies on adult memory, which may be inaccurate or reconstructed based on idealized relationship expectations rather than actual experiences.
Show answer
Answer: (A)
Evaluating measurement validity reveals that retrospective reports of childhood attachment are subject to recall bias and reconstruction effects. Adults' current attachment style may influence how they remember or interpret past relationships, confounding the measurement of childhood attachment as a distinct construct. This threatens construct validity because the study cannot cleanly separate past from present attachment patterns when both are measured retrospectively from the same source.
Question 4
A developmental psychologist studies continuous versus discontinuous development by conducting interviews with 40 parents about their children's developmental milestones (first words, toilet training, social skills). She codes interview transcripts for evidence of gradual versus stage-like changes and finds that parents describe both patterns across different domains. She concludes that development is neither purely continuous nor purely discontinuous but varies by domain. Which methodological concern most threatens the validity of this conclusion?
Retrospective parent reports of developmental milestones are subject to memory bias and may not accurately reflect the actual timing or nature of developmental changes.
Retrospective parent reports of developmental milestones are subject to social desirability bias and may not accurately reflect the actual timing or nature of developmental changes.
Retrospective parent reports of developmental milestones are subject to memory bias and may not accurately reflect parents' interpretations of whether changes were gradual or stage-like.
Retrospective parent reports of developmental milestones are subject to memory bias and may not accurately reflect differences between children in the sample rather than actual developmental patterns.
Show answer
Answer: (A)
Evaluating measurement validity reveals that retrospective parent reports introduce significant bias. Parents may misremember milestone timing, reconstruct events based on current knowledge, or interpret past changes through current understanding. This threatens construct validity because the study cannot cleanly measure whether development was actually continuous or discontinuous—it measures parents' retrospective interpretations, which may not reflect actual developmental patterns. Direct observation or prospective measurement would be more valid.
Question 5
A developmental researcher studies nature and nurture by examining reading ability in 60 children adopted internationally at different ages (ranging from 6 months to 4 years). She measures reading ability at age 8 and correlates it with age at adoption, finding that children adopted earlier show higher reading ability (r = -0.51). She concludes that early environmental enrichment in adoptive families promotes reading development. Which interpretation of these findings is most justified given potential confounds?
Children adopted earlier show better reading ability, but this could reflect either longer exposure to enriched environments or selection effects where healthier, more cognitively capable children are adopted earlier.
Children adopted earlier show better reading ability because longer exposure to enriched adoptive environments promotes reading development, and the correlation (r = -0.51) demonstrates this environmental effect.
Children adopted earlier show better reading ability primarily because adoption agencies place healthier, more cognitively capable children earlier, not because of environmental enrichment in adoptive families.
Earlier adoption causes better reading ability through environmental enrichment in adoptive families, as demonstrated by the significant correlation (r = -0.51) between adoption age and reading ability at age 8.
Show answer
Answer: (A)
Evaluating the appropriateness of conclusions given design limitations requires acknowledging both the apparent environmental effect and alternative explanations. Adoption agencies may preferentially place healthier or developmentally advanced children in earlier adoptions, or children adopted later may have experienced more severe institutional deprivation. The correlation could reflect environmental enrichment, selection bias, or both. This interpretation appropriately qualifies the conclusion by recognizing confounds the non-experimental design cannot eliminate.
Question 6
A developmental psychologist studies stability and change in attachment by conducting a longitudinal study measuring attachment security at ages 12 months, 24 months, and 36 months using the Strange Situation procedure. She finds moderate correlations between consecutive time points (r = 0.54 to 0.68) but notes that 35% of infants change attachment classification between assessments. She concludes that attachment shows both stability (moderate correlations) and change (classification shifts). Which aspect of this conclusion most accurately reflects the study's findings?
The conclusion accurately reflects the data; infants maintain relatively consistent ranking in attachment security (moderate correlations) while some shift between secure and insecure categories (classification changes).
The conclusion overstates stability; moderate correlations of r = 0.54 to 0.68 indicate weak to moderate relationships, suggesting attachment security rankings are inconsistent across time despite the categorical stability shown.
The conclusion is partially incorrect; while moderate correlations indicate relative stability in rankings, the 35% classification change rate is too high to support claims of stability and instead suggests attachment is predominantly unstable.
The conclusion misinterprets the correlations; values of r = 0.54 to 0.68 indicate strong stability in attachment security, so the 35% classification change must reflect limitations of the Strange Situation procedure rather than genuine developmental change.
Show answer
Answer: (A)
Evaluating the appropriateness of conclusions requires understanding that correlations and classification shifts measure different aspects of stability. Test-retest correlations of 0.54-0.68 indicate that infants maintain their relative ranking (if secure at 12 months, likely more secure than peers at 24 months), demonstrating relative stability. Simultaneously, 35% changing classifications indicates that some infants shift from secure to insecure or vice versa, demonstrating absolute change. Both findings are valid and not contradictory—they reflect different operationalizations of stability.
Question 7
A researcher follows 50 children from age 2 to 8, measuring language complexity every six months. Most children show gradual increases, but 12 show rapid accelerations followed by plateaus. Which design feature most supports concluding language development can be both continuous and discontinuous?
Tracking the same children over time reveals individual continuous and stage-like patterns.
Semiannual testing improves change detection but not identification of individual trajectories.
Sample size affects power to detect differences but not design-based trajectory evidence.
Standardized measures ensure reliable measurement but do not create longitudinal evidence.
Show answer
Answer: (A)
Following the same individuals lets the researcher observe both smooth growth and abrupt shifts within persons. Cross-sectional designs cannot show these within-person trajectories, so only longitudinal tracking supports the mixed conclusion.
Question 8
A researcher observes 25 preschoolers during free play on three separate days, coding helping, sharing, and comforting. Inter-day correlations are r = 0.48 to 0.62. Which design change would most strengthen the validity of concluding that prosocial behavior reflects individual differences?
Increase observation days to ten or more to improve measurement reliability.
Observe children in multiple contexts and use teacher ratings and peer reports.
Randomly assign children to activities to test situational effects experimentally.
Follow the same children one year later to test long-term stability.
Show answer
Answer: (B)
Sampling multiple contexts and multiple raters triangulates the construct and strengthens construct validity. If prosocial behavior is a stable trait, it should appear consistently across settings and observers, providing stronger evidence than single-context observation.
Question 9
A developmental psychologist recruits 200 participants ranging from age 8 to 80 and administers a battery of cognitive tests measuring working memory, processing speed, and executive function on a single occasion. The researcher finds that processing speed declines steadily with age while working memory shows a different pattern. Which research design did the psychologist employ?
Cross-sectional design, comparing different age groups at one point in time
Cohort-sequential design, measuring different age groups repeatedly over time
Repeated measures design, comparing each participant's performance across different cognitive tasks
Longitudinal design, measuring cognitive decline across the lifespan from childhood to old age
Show answer
Answer: (A)
Identifying cross-sectional design requires recognizing that participants of different ages were tested simultaneously without longitudinal follow-up. The single testing occasion and age-group comparison are defining features of cross-sectional methodology, which allows researchers to observe age differences but cannot track individual change trajectories.
Question 10
Researchers studying the development of attachment security recruited 50 infants at birth and assessed their attachment relationships with caregivers at 6 months, 12 months, 18 months, and 24 months using the Strange Situation procedure. They found that infants classified as securely attached at 6 months remained securely attached at later assessments, while insecurely attached infants showed more variability. Which research design allowed researchers to draw conclusions about stability and change in attachment?
Longitudinal design, following the same infants repeatedly over time
Cross-sectional design, comparing different infants at each age interval
Experimental design, randomly assigning infants to secure or insecure attachment conditions
Correlational design, measuring the relationship between caregiver sensitivity and infant attachment outcomes
Show answer
Answer: (A)
Longitudinal designs track identical participants across multiple time points, enabling researchers to observe individual developmental trajectories and stability patterns. The repeated assessments at 6, 12, 18, and 24 months allowed direct observation of whether attachment security remained stable or changed within individuals—the defining feature of longitudinal methodology.
What's on the AP Psychology Unit 3 practice test
The standard version takes about 94 minutes and follows the timing and directions of the AP exam, sized to one unit:
- 20 Multiple Choice Questions (24 minutes)
- 1 FRQ – FRQ 1 – Article Analysis Question (AAQ) (35 minutes)
- 1 FRQ – FRQ 2 – Evidence Based Question (EBQ) (35 minutes)
Questions are drawn from 2441 multiple-choice questions and 35 FRQs written for Unit 3, Development and Learning.
Practice AP Psychology Unit 3 FRQs
Answer the unit's free-response questions one at a time and get a score on every part.
- FRQ 1 – Article Analysis Question (AAQ) (15 questions)
- FRQ 2 – Evidence Based Question (EBQ) (20 questions)
Review Unit 3 before you start
- 3.1 Themes and Methods in Developmental Psychology
- 3.2 Physical Development Across the Lifespan
- 3.3 Gender and Sexual Orientation
- 3.4 Cognitive Development Across the Lifespan
- 3.5 Communication and Language Development
- 3.6 Social-Emotional Development Across the Lifespan
- 3.7 Classical Conditioning
- 3.8 Operant Conditioning
- 3.9 Social, Cognitive, and Neurological Factors in Learning