Questions: Psychology as Science: From Introspection to Neuroscience

Question 1

Wilhelm Wundt is often credited as the founder of experimental psychology. What did he establish in 1879, and why was it significant?

Model answer: Wundt established the first laboratory dedicated exclusively to psychological research at the University of Leipzig in 1879. This was significant not primarily for the specific methods used (introspection under controlled conditions) but for institutionalizing psychology as an experimental science separate from philosophy. The laboratory created a training site for psychologists, a model for experimental investigation of mental processes, and a professional community. Wundt trained dozens of students who went on to found psychology departments and laboratories worldwide.

The founding of Wundt's laboratory is a conventional origin point for scientific psychology, though the exact date and its significance are debated. More important was the broader move to apply experimental methods to mental phenomena.

Question 2

Behaviorism, dominant in American psychology from roughly 1913-1960, rejected the study of mental states. What was the behaviorist argument, and what was the movement's legacy?

Model answer: John Watson's 1913 manifesto 'Psychology as the Behaviorist Views It' argued that mental states (consciousness, intentions, desires) were inaccessible to scientific observation and that psychology should restrict itself to observable behavior and environmental stimuli. B.F. Skinner extended this: all behavior was conditioned by reinforcement history; internal mental states were unnecessary explanatory fictions. Behaviorism's legacy is mixed: it produced rigorous experimental learning theory and useful applied techniques (behavioral therapy). But its rejection of mental states prevented engagement with perception, memory, reasoning, and language, leaving large domains of psychology unstudied until the cognitive revolution.

Question 3

What was the 'replication crisis' in psychology, and what did it reveal about scientific practice?

• A. It revealed that most psychology experiments used too few subjects to detect real effects
• B. Large-scale replication efforts found that a substantial proportion of published psychology findings could not be reproduced, revealing systemic problems with publication bias and statistical practices
• C. It showed that behavioral psychology was more reliable than cognitive psychology
• D. It revealed that only animal studies in psychology were replicable

Answer: (B)

The Open Science Collaboration's 2015 replication study attempted to reproduce 100 published psychology experiments and found that only about 36-39% reproduced the original effect. Subsequent similar projects found similar rates across social and cognitive psychology. This revealed: publication bias (journals preferred positive results); p-hacking (researchers tried multiple analyses until something reached significance); small sample sizes with low statistical power; and questionable research practices. The crisis has spurred reform efforts including pre-registration of studies and requirements for larger samples.

Question 4

Freudian psychoanalysis provided a comprehensive theory of the mind, personality, and psychopathology. It is therefore a good example of scientific psychology.

• T. True
• F. False

Answer: False

Freudian psychoanalysis is controversial as science precisely because it is comprehensive: Karl Popper used it as a paradigm case of an unfalsifiable theory. For any outcome, a psychoanalytic explanation can be constructed post hoc. Core Freudian concepts (the unconscious, repression, the Oedipus complex) have proven difficult to test rigorously, and their specific predictions have frequently failed empirical examination. Freud's clinical methods (case studies without controls) could not distinguish genuine therapeutic effect from placebo. This does not mean psychoanalysis had no insights or value, but it does not meet standards for scientific theory.

Question 5

How did the 'cognitive revolution' of the 1950s-1960s change psychology, and what technologies enabled it?

Model answer: The cognitive revolution rejected behaviorism's ban on internal mental states and reintroduced attention, memory, perception, and reasoning as legitimate objects of scientific study. It was enabled partly by information processing theory — the computer as a metaphor for mind — which gave psychologists a vocabulary for mental representations and processes that was not mentalistic in the old introspective sense. George Miller's 1956 'magical number seven' paper on working memory capacity, Chomsky's critique of Skinner's behaviorist account of language, and early cognitive experiments on attention and memory all contributed. The revolution opened cognitive science and eventually cognitive neuroscience.

The cognitive revolution is usually dated to the mid-1950s and associated with the development of information theory, early computers, and Chomsky's linguistics. It fundamentally restructured what psychology studied.