Child Psychology and Development

This is a factual recall question about prevalence statistics. Phonological disorders (speech sound difficulties) of unknown origin affect approximately 3% of preschool children. The exact percentage varies by study and diagnostic criteria, but 3% is the most commonly cited figure in speech-language pathology literature. Without access to current statistics, D (3%) is the best choice among the options.

Continuous reinforcement means EVERY correct response is followed by a reinforcer. Intermittent (or partial) reinforcement reinforces only some responses, making it less effective for initial learning. Negative reinforcement is about removing an aversive stimulus, not about frequency.

Down syndrome (Trisomy 21) is caused by an extra 21st chromosome, resulting in 47 chromosomes instead of the normal 46. Cretinism is from thyroid deficiency, hydrocephaly involves cerebrospinal fluid accumulation, and microcephaly is an abnormally small head - none involve chromosomal count changes.

Stuttering manifests as multiple fluency disruptions: sound repetitions ('l-l-l-look'), prolongations ('lllllook'), and pauses (filled 'um' or unfilled silences). All these are characteristic features, making 'All of the above' correct.

Successive approximation is operant conditioning terminology for shaping behavior through a series of increasingly accurate responses - each response is closer to the target behavior than the last. Gradients refer to stimulus intensity changes, adaptations are evolutionary concepts, and conditioning trials are individual learning episodes.

In Pavlov's classical conditioning experiments, the bell (originally neutral) became the conditioned stimulus after being paired with food (unconditioned stimulus). The dogs learned to salivate to the bell alone. Salivation itself is the response, not a stimulus.

Prolonged speech is a well-established therapeutic technique for stuttering involving slowed speech rate with gentle voice onset and continuous phonation. This helps break the rapid, tense speech pattern characteristic of stuttering. Purposeful, practical, and delayed speech are not standard terminology in stuttering treatment.

For reinforcement to work in operant conditioning, it must be CONTINGENT on the response - the consequence follows and depends on the specific behavior. This is fundamental to operant conditioning principles. The other options are not standard operant conditioning terminology.

In classical conditioning (Pavlovian learning), the critical events (CS-US pairing) occur BEFORE the conditioned response develops. The organism learns to predict the US from the CS. This distinguishes it from operant conditioning where consequences follow responses.

The child discriminates between similar stimuli (furry black cat vs short-haired tabby) and responds differently - avoiding one but playing with the other. This is stimulus discrimination, not extinction (response decrease), negative transfer (old learning interfering), or successive approximation (shaping through gradual steps).

This reflects the self-serving bias - we credit internal factors (ability, effort) for our successes but often blame external factors (luck, task difficulty) for failures. This protects self-esteem. Option A captures this internal attribution for success.

The frustration-aggression hypothesis states that frustration (blocking of goal-directed behavior) consistently produces aggression. This foundational social psychology principle suggests aggression is a natural consequence when people are prevented from achieving their goals.

Behavioral personality theories are criticized for neglecting temperament, emotional experiences, and subjective mental states. By focusing exclusively on observable behaviors and environmental conditioning, they overlook internal psychological processes that contribute to personality differences between individuals.

Learning theorists emphasize situational determinants of behavior rather than stable personality traits. They argue that behavior is primarily shaped by environmental factors and learning history in specific contexts, not by enduring internal characteristics.

Cohesiveness refers to the degree of attraction among group members - the forces that keep members in the group and motivate them to maintain membership. High cohesiveness means members like each other and value group membership.

A personality theory is an interrelated system of concepts used to explain personality. It provides a framework for understanding why people behave consistently differently, organizing observations and predictions about personality into a coherent explanatory system.

Personality types are criticized for oversimplifying complex human personalities by forcing individuals into rigid categories. This ignores the continuous nature of most personality traits and the unique combinations that make each person distinctive.

The unconscious mind contains repressed memories, emotions, and thoughts that are inaccessible to conscious awareness but still influence behavior. These contents are kept out of consciousness through defense mechanisms, though they affect psychological functioning.

Attribution theory examines how people infer causes of behavior - whether attributed to internal factors (personality, ability) or external factors (situation, environment). We make these causal inferences to understand and predict behavior in social contexts.

Intellectual disability is defined by three criteria: significantly below-average intellectual functioning (IQ < 70), impairments in adaptive functioning across daily life domains, and onset before age 18. All three criteria must be present for diagnosis.