- A 2-year-old insists on dressing himself, even though he struggles and puts his shirt on backward. His parents are frustrated but allow him the time to try. According to Erikson's theory of psychosocial development, the parents' supportive reaction is most directly fostering a sense of:
Answer: autonomy.
This scenario is a classic example of Erikson's second stage, Autonomy vs. Shame and Doubt (ages 1-3). During this stage, toddlers are focused on developing a sense of personal control and independence. By allowing the child to try, even if imperfectly, the parents are fostering his sense of autonomy. Discouraging him or overly criticizing his mistakes could lead to feelings of shame and doubt. Trust vs. Mistrust (infancy), Initiative vs. Guilt (preschool), and Industry vs. Inferiority (school age) are other stages that occur at different ages and involve different psychosocial crises.
- A 3-year-old child, upon seeing several mice run across the floor, exclaims, "Look at all the mouses!" This linguistic error is a classic example of:
Answer: overregularization.
Overregularization (or overgeneralization) occurs when a child applies a grammatical rule to cases where it doesn't apply. In this case, the child is applying the standard English rule for forming plurals (add "-s") to an irregular noun ("mouse"). This error is a positive sign that the child is learning grammatical rules, not just imitating. Telegraphic speech involves using short, content-word-only sentences. A holophrase is a single word used to convey a full thought. Receptive language refers to understanding language, whereas this is an error in language production (expressive language).
- In an Ainsworth-style "Strange Situation" experiment, 18-month-old Maya appears dazed and confused upon her mother's return. She initially moves toward her mother but then suddenly freezes, backs away, and engages in repetitive rocking. She seems to show no coherent strategy for dealing with the stress of reunion. This pattern of behavior is most indicative of which attachment style?
Answer: Disorganized attachment
Maya's contradictory, apprehensive, and confused behaviors—such as approaching then freezing or backing away—are the defining characteristics of disorganized attachment. This style is thought to reflect a breakdown of a coherent attachment strategy. A securely attached child would seek and receive comfort. An avoidant child would ignore the mother. An ambivalent/resistant child would display a mixture of clinginess and angry resistance, rather than disorganized fear and confusion.
- During the first few years of life, a child's brain undergoes a period of rapid synaptogenesis followed by a process of synaptic pruning. Which statement best explains the developmental significance of this pruning process?
Answer: It eliminates unused or weaker synaptic connections, increasing the efficiency of neural networks.
Synaptic pruning is a crucial, experience-dependent process in normal brain development. The brain initially overproduces synapses, and then pruning eliminates those that are used less frequently. This streamlines neural circuits, making the remaining connections stronger and more efficient. Pruning is not a deficit; it is essential for learning and development. The formation of new connections is synaptogenesis. While some pruning happens prenatally, major waves occur throughout childhood and adolescence.
- A toddler with what Thomas and Chess would classify as a "difficult" temperament is raised by parents who are highly structured, patient, and calm. According to the "goodness-of-fit" model, what is the most likely long-term outcome for this child?
Answer: The child is likely to develop favorable outcomes due to the accommodating parenting environment.
The goodness-of-fit model proposes that developmental outcomes are not determined by temperament alone, but by the interaction between a child's temperament and their environment. A patient, structured parenting style is a good fit for a child with a difficult temperament. This environment accommodates the child's needs and helps them learn to regulate their behavior, leading to more favorable outcomes. The model does not suggest that temperament will be completely changed or that it alone determines outcomes. The parenting described is a good match, not a mismatch.
- A researcher shows 4-year-old Leo two identical short, wide glasses with the same amount of water. Leo agrees they have the same amount. The researcher then pours the water from one glass into a tall, thin glass. When asked which glass has more water, Leo points to the tall one. According to Piaget's theory, Leo's error is best explained by his cognitive tendency toward:
Answer: centration, as he is focusing on only one dimension of the situation while ignoring others.
Leo's error in this conservation task is a classic example of centration, a hallmark of Piaget's preoperational stage. He focuses solely on the height of the water in the tall glass (one dimension) and ignores its width, leading him to conclude it has more water. Egocentrism relates to the inability to take another's perspective, not logical reasoning about physical properties. Object permanence is the understanding that objects exist when not seen, which is mastered much earlier. Reversibility is the ability to mentally undo an action; Leo's lack of reversibility contributes to the error, but centration describes the perceptual focus that causes the error in the first place.
- The development of binocular vision in infants, which requires input from both eyes during a specific timeframe to develop normally, is often cited as an example of a critical period. How does a "critical period" differ conceptually from a "sensitive period"?
Answer: A critical period is when development must occur, while a sensitive period is when development occurs most easily.
The core distinction is one of necessity and flexibility. A critical period is a finite window of time during which a specific developmental milestone must occur. If the necessary experience is not available during this window, the development may be impossible to achieve later. A sensitive period is an optimal time for development to occur, but development can still happen outside this window, albeit with more difficulty or less success. Both types of periods can apply to various domains and are the result of an interaction between biology and environment.
- A pregnant woman is unknowingly exposed to a novel teratogen during the 5th week of gestation (post-conception). This teratogen is known to specifically disrupt the process of organogenesis. Which of the following developmental outcomes is most probable for the fetus?
Answer: Impaired development of the central nervous system and heart.
The 5th week of gestation falls within the embryonic period (weeks 3-8), which is the critical period for organogenesis, the formation of major organs and body systems. The central nervous system and heart are among the first major systems to begin developing during this time, making them highly vulnerable. Implantation occurs earlier, in the germinal period. Stunted growth is more characteristic of teratogen exposure in the fetal period. While external genitalia also develop, the major organ systems are at peak vulnerability during the early embryonic stage.
- Most adults cannot recall autobiographical events from before the age of 3, a phenomenon known as infantile amnesia. Which of the following is considered a primary neurological and cognitive explanation for this phenomenon?
Answer: The hippocampus and prefrontal cortex, crucial for long-term memory consolidation, are not yet fully mature in infancy.
A leading explanation for infantile amnesia is the immaturity of key brain structures involved in forming and retrieving long-term, explicit, autobiographical memories. The hippocampus, which is vital for consolidating new memories, and the prefrontal cortex, involved in memory organization and retrieval, undergo prolonged development throughout early childhood. The Freudian explanation (A) lacks empirical support. Infant perception (C) is surprisingly robust. While language development and brain lateralization (D) may play a role, the fundamental immaturity of the memory system is considered a more direct cause.
- A researcher is investigating the development of theory of mind (ToM). Which of the following scenarios provides the strongest evidence that a child has moved beyond simple false-belief understanding to a more advanced ToM?
Answer: The child understands that a person can feel one emotion while displaying another, such as pretending to like a gift.
Understanding that internal states can differ from external expressions (display rules) is a more advanced, second-order aspect of ToM. It requires thinking about what another person thinks or feels, and also how they might manage the expression of that feeling. Choice A describes a standard first-order false-belief task, a foundational ToM skill. Choice C is about self-awareness, not necessarily understanding others' minds. Choice D (deception) requires ToM but can often be accomplished with a simple first-order understanding (e.g., "If I say X, they will believe X").
- A physician is counseling two pregnant patients about the risks of a particular medication, a known teratogen. Patient A took a single, small dose during the 4th week of gestation. Patient B took a high dose daily from the 4th to the 8th week. Which principle of teratology best explains why the risk of a severe birth defect is significantly higher for Patient B?
Answer: Dose-response relation
The dose-response relation is a fundamental principle of teratology stating that the amount and duration of exposure to a teratogen directly influences the severity of its effects. While both exposures occurred during a critical period, Patient B's higher dosage and longer duration of exposure dramatically increase the likelihood and severity of damage. The concept of a critical period explains why that timeframe is vulnerable, but dose-response explains the difference in outcome between the two patients. Genetic susceptibility and sleeper effects are also valid principles but are not the primary explanation for the difference described in the stem.
- A 12-month-old is placed at the edge of a "visual cliff." The infant hesitates and then looks at their mother's face on the other side. The mother exhibits a fearful facial expression. Based on the principles of social referencing, the infant will most likely:
Answer: become distressed and refuse to crawl across the cliff.
This scenario demonstrates social referencing, the process whereby infants use the emotional cues of a trusted adult to interpret ambiguous situations and guide their behavior. The visual cliff creates ambiguity—it looks dangerous but feels solid. By looking at the mother, the infant is seeking information. The mother's fearful expression signals danger, so the infant is most likely to adopt that interpretation, become distressed, and avoid crossing. By 12 months, infants have sufficient depth perception to see the cliff and are actively engaged in social referencing with their caregivers.
- A key distinction between the embryonic stage and the fetal stage of prenatal development is that:
Answer: the embryonic stage is characterized by organogenesis, while the fetal stage is characterized by growth and refinement.
The embryonic stage (weeks 3-8) is primarily defined by organogenesis, the formation of all major body organs and systems. The subsequent fetal stage (week 9 to birth) is primarily a period of extensive growth, maturation, and refinement of these already-formed structures. Implantation occurs in the germinal stage. The embryonic stage is the period of greatest vulnerability to major structural damage from teratogens. The central nervous system begins developing in the embryonic stage but continues to develop throughout the fetal period and postnatally.
- A researcher wants to determine if a 4-month-old infant can distinguish between the color blue and the color green. Which of the following procedures would be the most effective way to use the habituation paradigm to test this?
Answer: Repeatedly show a blue patch until looking time decreases, then show a green patch and measure if looking time increases.
This describes the standard habituation-dishabituation paradigm. Habituation is the decrease in response (e.g., looking time) to a repeated stimulus. If the infant's looking time recovers (dishabituates) when a new stimulus (the green patch) is presented, it implies the infant perceives the new stimulus as different from the habituated one. Choice A is the preferential looking paradigm. Choice C uses physiological measures but isn't the habituation paradigm itself. Choice D describes an operant conditioning procedure.
- A developmental psychologist observes a preschooler successfully solving a complex puzzle after receiving targeted hints from a teacher. Which of the following concepts best explains how the teacher's assistance facilitated the child's success, according to Vygotsky's sociocultural theory?
Answer: Scaffolding within the child's zone of proximal development.
Vygotsky's theory emphasizes the role of social interaction in cognitive development. The Zone of Proximal Development (ZPD) is the range of tasks a child can perform with guidance but not yet independently. Scaffolding is the process by which a more knowledgeable other (the teacher) provides temporary support to help the child master a task within their ZPD. Assimilation is a Piagetian concept. The psychosocial crisis is from Erikson's theory. The stages mentioned are Piaget's, and the scenario describes a learning process, not a stage transition.
- A 10-month-old infant repeatedly retrieves a toy hidden under a cloth to his left (Location A). A researcher then hides the toy under a new cloth to his right (Location B) as the infant watches. The infant then reaches for Location A. This A-not-B error suggests that the infant's concept of the object is still partially dependent on:
Answer: a motor habit of reaching that was previously successful.
The A-not-B error demonstrates that even after an infant achieves basic object permanence, their representation of the object is not fully independent and objective. They saw the toy moved to B, so perception isn't the issue. They are searching, so they have some object permanence. The error occurs because the infant's knowledge of the object's location is still tied to their own successful motor action of reaching for location A. They have difficulty inhibiting this prepotent motor response in favor of the new visual information.
- A newborn infant startles in response to a loud noise, flinging out his arms and legs and then pulling them back toward his body. This action is an example of the:
Answer: Moro reflex, which is thought to be a primitive startle response.
The behavior described is the Moro reflex, an involuntary startle response in newborns. It is believed to have evolutionary roots as a mechanism to help an infant cling to its mother. The rooting reflex involves turning the head and opening the mouth in response to a cheek stroke. The Babinski reflex involves the toes fanning out when the sole of the foot is stroked. The grasping reflex involves the infant tightly closing its fist around an object placed in its palm.
- A pediatrician is assessing the motor development of a 9-month-old infant. Which of the following pairs of observations would be most consistent with the normative principles of cephalocaudal and proximodistal development?
Answer: The infant can purposefully grasp a toy but cannot yet walk independently.
The cephalocaudal principle states that development proceeds from head to tail (or feet). The proximodistal principle states development proceeds from the center of the body outward. Choice A is consistent with both: arm/hand control (upper body) develops before coordinated leg control for walking (cephalocaudal), and control of the arms to grasp develops before fine motor control of the fingers (proximodistal) and after control of the core. Choice B violates the cephalocaudal principle (head control comes first). Choice C violates the proximodistal principle (core control for rolling comes before fine finger control). Choice D violates the cephalocaudal principle (arm control precedes coordinated leg control).
- A group of 3-year-olds is asked questions about gender. According to developmental research on gender identity, which of the following beliefs are they most likely to express?
Answer: They can correctly label themselves and others as boys or girls but believe gender can change with superficial characteristics.
By age 3, most children have achieved gender identity—they can label themselves and others by gender. However, they have not yet developed gender constancy. They often believe that gender is a superficial characteristic that can be changed by altering one's clothing, hair, or activities. Gender constancy, the understanding that gender is a stable and permanent trait, typically develops between ages 5 and 7. Gender labeling (Choice A) generally emerges before gender-typed preferences become highly rigid (Choice C).
- A researcher has pregnant women read a specific story aloud daily during their last trimester. Days after birth, their newborns are given a special pacifier that allows them to hear different stories based on their sucking pattern. Which finding would provide the strongest evidence for fetal learning?
Answer: The newborns alter their sucking pattern to hear the familiar story over a novel story, when both are read by their mother.
This experimental design, based on classic studies by DeCasper and others, isolates the variable of interest: memory for the story's specific acoustic patterns. By having the mother read both the familiar and novel stories, the voice is held constant. If the infant works (by changing their sucking rate) to hear the familiar story, it demonstrates both memory of the story from the fetal period and a preference for it. Choice A is a general finding, not specific to the story. Choice B doesn't control for the voice variable. Choice D could indicate soothing, but the operant choice in C provides stronger evidence of specific recognition and preference.
