Overview
This lecture covers the development of psychology from philosophical roots, focusing on key figures, concepts, competing schools of thought, and debates about introspection and the study of consciousness and behavior.
Early Influences and Philosophical Roots
- Fechner influenced by German Romanticism and Goethe.
- Panpsychism: the entire universe has consciousness.
- Monism: only one type of substance exists (mind or body).
- Dualism: mind and body are two separate substances.
- Dual aspect monism: the same reality can be viewed as either mental or physical.
Fechner and Psychophysics
- Fechner's blindness led to new insights on consciousness in nature.
- Developed psychophysics, studying the relationship between physical stimuli and psychological experience.
- Introduced the concept of JND (just noticeable difference) as a unit of measurement.
- Proposed psychological experience (S) = K*log(physical intensity).
Wundt and the Birth of Experimental Psychology
- Wilhelm Wundt founded the first psychology lab (1879) and journal.
- Distinguished psychology from philosophy and physiology.
- Defined psychology as the scientific study of conscious experience.
- Developed voluntaristic psychology: perception (automatic) vs. apperception (attentive, creative synthesis).
- Studied reaction time and mental chronometry.
- Believed central processes couldn't be studied experimentally.
Titchener and Structuralism
- Edward Titchener studied under Wundt; led structuralism in the US.
- Sought to identify elements of the mind and their associations.
- Used introspection to analyze consciousness.
- Introduced stimulus error: confusing the object with the mental process.
- Emphasized cataloguing sensations, their connections, and physiological bases.
The Imageless Thought Controversy
- Oswald Kulpe argued for imageless thoughts (unconscious thought).
- Mental set: unrecognized rules guiding thought.
- Disagreement between Wundt and Kulpe on consciousness vs. unconscious processes.
William James and Functionalism
- Defined psychology as the science of mental life and its conditions.
- Developed pragmatism: truth is what is useful in context.
- Mind is adaptive, shaped by experience (stream of consciousness).
- Focused on function, not structure.
Rise of Behaviorism
- John B. Watson: psychology should focus on observable behavior only.
- Dismissed introspection as subjective.
- Goal: predict and control behavior.
- Problems with introspection: subjectivity, limited to humans, ignores the unconscious.
Classical and Operant Conditioning
- Pavlov: classical conditioning (associating stimuli with responses).
- Skinner: operant conditioning (behavior shaped by consequences).
- Radical behaviorism: ignores consciousness, focuses on S-R (stimulus-response).
Cognitive Psychology and Information Processing
- Cognitive psychology: scientific study of behavior and mental processes.
- Brain likened to a computer: input, processing, memory, output.
- Artificial intelligence research inspired by human cognition.
Introspection: Methods and Critiques
- Hurlburt’s guidelines for introspection: specificity, immediacy, minimal interference.
- DES (Descriptive Experience Sampling): systematic reporting of inner experiences.
- Schwitzgebel: knowledge of our own minds is less reliable than knowledge of the world.
- Introspection is fallible and limited.
Limits of Introspection and Verbal Reports
- Nisbett & Wilson: people are often unaware of their mental processes.
- Verbal reports on mental processes are often inaccurate.
- Ericsson & Simon: talk-aloud protocols to study thought processes in real time.
Key Terms & Definitions
- Panpsychism — The belief that all matter has consciousness.
- Monism — The idea that only one kind of substance exists (mind or body).
- Dualism — The belief in two separate substances: mind and body.
- Psychophysics — Study of the link between physical stimuli and psychological experience.
- Introspection — Examination of one’s own thoughts and feelings.
- Structuralism — School seeking to identify the elements and structure of the mind.
- Functionalism — Focuses on the functions and adaptive purposes of the mind.
- Behaviorism — Studies observable behavior, not mental processes.
- Classical Conditioning — Learning through association of stimuli.
- Operant Conditioning — Learning through consequences of behavior.
- Cognitive Psychology — Scientific study of the mind and mental processes.
- Descriptive Experience Sampling (DES) — Method for capturing real-time reports of inner experience.
Action Items / Next Steps
- Review assigned reading on Fechner, Wundt, James, and Watson.
- Prepare a summary of the critique of introspection for discussion.
- Practice talk-aloud protocol as described in class.