Experimental Psychology — BF 180–198.7

Wilhelm Wundt — Contributions to the Theory of Sensory Perception (1862)

Wundt, Wilhelm. Contributions to the Theory of Sensory Perception. Leipzig: Winter, 1862

Wundt's Beiträge zur Theorie der Sinneswahrnehmung, published in 1862, is the first of his major psychological works and the one that anticipates the experimental program he would establish at Leipzig seventeen years later. The work argues for a natural science of the mind based on experimental observation and quantitative measurement, in explicit opposition to Herbart's mathematical but non-experimental approach. The 1862 publication date makes this the earliest systematic statement of the experimental psychology program. Available in facsimile reprint from various scholarly publishers.

F. C. Donders — On the Speed of Mental Processes (1868)

Donders, F. C. On the Speed of Mental Processes. Translated by W. G. Koster. Acta Psychologica 30 (1969): 412–431

Donders's 'On the Speed of Mental Processes' (Über die Schnelligkeit psychischer Processe), published in 1868 and translated by W. G. Koster in Acta Psychologica in 1969, introduced the subtractive method for measuring the duration of mental processes through reaction time experiments. Donders's A, B, and C reaction tasks, in which the subject must identify a stimulus and sometimes choose between responses, established reaction time as a tool for studying the timing of mental processes that remains central to cognitive psychology. The Acta Psychologica translation (vol. 30) is the standard English edition.

Oswald Külpe — Outlines of Psychology (1893)

Külpe, Oswald. Outlines of Psychology. Translated by Edward Bradford Titchener. London: Swan Sonnenschein, 1895

Külpe's Grundriss der Psychologie, published in 1893 and translated by E. B. Titchener as Outlines of Psychology in 1895, is the most systematic early presentation of the experimental psychology program for English-language audiences. Külpe was Wundt's most distinguished student and later founded the Würzburg school, but the Outlines represents orthodox Wundtian psychology before his divergence from Leipzig. The book was widely used in American university courses in the 1890s and provides essential documentary evidence of what experimental psychology looked like at the moment American laboratories were being established. The 1895 Sonnenschein translation is the standard English edition; available in facsimile reprint.

Edward Bradford Titchener — Experimental Psychology: A Manual of Laboratory Practice (4 vols.) (4 vols.) (1901)

Titchener, Edward Bradford. Experimental Psychology: A Manual of Laboratory Practice. 4 vols. New York: Macmillan, 1901–1905

Titchener's Experimental Psychology, published in four volumes between 1901 and 1905 by Macmillan, is the most complete operational manual of early experimental psychology in English and the document that established structuralist introspective method as the standard approach in American laboratories before Watson. The two student volumes and two instructor volumes provide detailed procedures for experiments on sensation, perception, and reaction time. While primarily of historical interest, the work documents the laboratory practices of the Wundtian tradition in a way no secondary source can match.

Joseph Jastrow — The Subconscious (1906)

Jastrow, Joseph. The Subconscious. Boston: Houghton Mifflin, 1906

Jastrow's The Subconscious, published in 1906, represents the American functionalist tradition's approach to experimental psychology and its interest in practical and applied dimensions of mental life. Jastrow was one of the first professors of psychology in an American university and a gifted expositor of the new psychology to general audiences. His experimental work on illusions, suggestion, and subliminal perception bridges the laboratory tradition and the popular psychology of his era. The Houghton Mifflin edition is the original.

Hugo Münsterberg — Psychology and Industrial Efficiency (1913)

Münsterberg, Hugo. Psychology and Industrial Efficiency. Boston: Houghton Mifflin, 1913

Münsterberg's Psychology and Industrial Efficiency, published in 1913, is the founding document of applied psychology and industrial psychology. Münsterberg argues that experimental psychology's methods can be applied to the selection, training, and motivation of workers, and he reports experiments on vocational aptitude testing, accident prevention, and the psychology of advertising. The work established the precedent for psychology's expansion from pure laboratory science to practical application in business, education, and law. The Houghton Mifflin edition is the original; available in facsimile reprint.

E. W. Scripture — The New Psychology (1897)

Scripture's The New Psychology, published in 1897, is the most accessible and widely read introduction to experimental psychology for American audiences in the 1890s. Scripture's account of the laboratory methods, the apparatus, and the experimental findings of the new science introduced tens of thousands of general readers to psychology as a laboratory discipline. The work provides a clear picture of what experimental psychology looked like to educated observers before behaviorism, and is useful for historical collections documenting the public reception of the new psychology.

Edward L. Thorndike — Animal Intelligence (1898)

Thorndike, Edward L. Animal Intelligence: Experimental Studies. New York: Macmillan, 1911

Thorndike's Animal Intelligence: An Experimental Study of the Associative Processes in Animals, published as a monograph supplement to the Psychological Review in 1898, is the foundational document of the experimental study of learning and the direct precursor of behaviorism. Thorndike's puzzle-box experiments with cats and chicks demonstrated that animal learning proceeds by trial and error and the gradual stamping-in of successful responses – the law of effect. The work introduced the experimental method into the study of learning, displaced introspection as the method of animal psychology, and established the stimulus-response framework that Watson would generalize to all psychology. The Macmillan 1911 collected edition is the standard scholarly text.

John B. Watson — Psychology as the Behaviorist Views It (1913)

Watson, John B. Psychology as the Behaviorist Views It. Psychological Review 20, no. 2 (1913): 158–177

Watson's 'Psychology as the Behaviorist Views It,' published in Psychological Review in 1913, is the manifesto of behaviorism and the most influential single paper in the history of experimental psychology. Watson argues that consciousness is not a proper subject for scientific investigation, that introspection is not a valid scientific method, and that psychology should be defined as the prediction and control of behavior through the study of stimulus-response relationships. The paper is reproduced in numerous anthologies; the standard citation is Psychological Review 20(2), 1913: 158–177. Available through JSTOR.

Clark L. Hull — Principles of Behavior (1943)

Hull, Clark L. Principles of Behavior: An Introduction to Behavior Theory. New York: Appleton-Century-Crofts, 1943

Hull's Principles of Behavior, published by Appleton-Century-Crofts in 1943, is the most systematic and ambitious attempt to construct a formal deductive theory of behavior in the history of psychology. Hull's hypothetico-deductive system derived behavioral predictions from postulates about drive, habit strength, and inhibition in a way that modeled itself on Newtonian mechanics. Though the specific theory did not survive empirical testing, the attempt defined the aspirations of behaviorist theorizing at its most rigorous. Essential for research collections documenting the formal theory tradition in experimental psychology.

Edward C. Tolman — Purposive Behavior in Animals and Men (1932)

Tolman, Edward C. Purposive Behavior in Animals and Men. Berkeley: University of California Press, 1967

Tolman's Purposive Behavior in Animals and Men, published by Century in 1932, introduced the concept of cognitive maps and purposive behaviorism as alternatives to the mechanistic stimulus-response framework of Watson and Hull. Tolman's maze experiments demonstrated that rats developed internal representations of their environments – cognitive maps – that guided behavior in ways that simple S-R chains could not explain. The work is the direct precursor of cognitive psychology's revival of mental representation as a scientific concept. The University of California Press reprint is the standard scholarly edition.

George A. Miller — The Magical Number Seven, Plus or Minus Two (1956)

Miller, George A. The Magical Number Seven, Plus or Minus Two: Some Limits on Our Capacity for Processing Information. Psychological Review 63, no. 2 (1956): 81–97

Miller's 'The Magical Number Seven, Plus or Minus Two: Some Limits on Our Capacity for Processing Information,' published in Psychological Review in 1956, is the most cited paper in cognitive psychology and the one most often identified as a founding document of the cognitive revolution. Miller's demonstration that short-term memory capacity is limited to approximately seven chunks of information, and his argument that this reflects the operation of an information-processing system with a fixed channel capacity, introduced information-theoretic concepts into psychology and helped establish cognitive psychology's vocabulary. Standard citation is Psychological Review 63(2), 1956: 81–97.

Ulric Neisser — Cognitive Psychology (1967)

Neisser, Ulric. Cognitive Psychology. New York: Appleton-Century-Crofts, 1967

Neisser's Cognitive Psychology, published by Appleton-Century-Crofts in 1967, is the foundational textbook of the cognitive revolution and the work that gave the new discipline its name, its vocabulary, and its organizing framework. Neisser's information-processing account of perception, attention, memory, and thinking, framed by the computer analogy that defined cognitive science's first generation, provided the conceptual architecture for decades of experimental research. The original 1967 Appleton-Century-Crofts edition remains the standard scholarly reference.

B. F. Skinner — The Behavior of Organisms (1938)

Skinner, B. F. The Behavior of Organisms: An Experimental Analysis. New York: Appleton-Century-Crofts, 1938

Skinner's The Behavior of Organisms, published by Appleton-Century-Crofts in 1938, is the foundational experimental monograph of operant behaviorism. Skinner reports the experiments with rats in the operant conditioning chamber (the 'Skinner box') that established the law of effect as the basis for behavioral analysis, introduced the concepts of reinforcement schedules, extinction, and spontaneous recovery, and demonstrated the power of contingency-shaped behavior. The work is the methodological foundation of behavior analysis. The original Appleton-Century-Crofts edition and the Copley Publishing Group reprint are the standard scholarly texts.

David M. Green and John A. Swets — Signal Detection Theory and Psychophysics (1966)

Green, David M., and John A. Swets. Signal Detection Theory and Psychophysics. Huntington, NY: Krieger, 1974

Green and Swets's Signal Detection Theory and Psychophysics, published by Wiley in 1966 and reprinted by Krieger in 1974, introduced signal detection theory to psychology and transformed the methodology of psychophysics, perception research, and decision research. SDT separates the sensitivity of the observer from the observer's response criterion, providing a methodology that is independent of the observer's motivation and expectations. The framework has been applied to medical diagnosis, eyewitness testimony, and memory recognition. The Krieger reprint is the standard scholarly text.

Jacob Cohen — Statistical Power Analysis for the Behavioral Sciences (1969)

Cohen, Jacob. Statistical Power Analysis for the Behavioral Sciences. 2nd ed. Hillsdale, NJ: Lawrence Erlbaum, 1988

Cohen's Statistical Power Analysis for the Behavioral Sciences, first published in 1969 and revised in a second edition in 1988 by Lawrence Erlbaum, is the foundational work in power analysis and effect size methodology for psychological research. Cohen's systematic treatment of the relationship between sample size, effect size, alpha level, and statistical power, and his introduction of the standardized effect size measures (d, r, f, w) that now bear his name, provided the methodological tools for evaluating the practical significance of research findings. The second edition is the standard scholarly text.

Ivan P. Pavlov — Conditioned Reflexes (1927)

Pavlov, Ivan P. Conditioned Reflexes: An Investigation of the Physiological Activity of the Cerebral Cortex. Translated by G. V. Anrep. London: Oxford University Press, 1927

Pavlov's Conditioned Reflexes: An Investigation of the Physiological Activity of the Cerebral Cortex, published in the English translation by G. V. Anrep for Oxford University Press in 1927, is the foundational document of classical conditioning and one of the most important works in the history of experimental psychology. Pavlov's systematic experimental analysis of the conditioned reflex in dogs – establishing the principles of acquisition, extinction, spontaneous recovery, generalization, and discrimination – provided behaviorism with its primary empirical paradigm. The Oxford University Press translation is the standard scholarly text.

Robert Rosenthal — Experimenter Effects in Behavioral Research (1966)

Rosenthal, Robert. Experimenter Effects in Behavioral Research. Enlarged ed. New York: Irvington, 1976

Rosenthal's Experimenter Effects in Behavioral Research, published by Appleton-Century-Crofts in 1966 and revised in 1976 by Irvington, is the foundational work on demand characteristics, expectancy effects, and the impact of experimenter behavior on experimental outcomes. Rosenthal's demonstration that experimenters' expectations influence the behavior of their subjects – in both animal and human experiments – identified a major confound in behavioral research and led to the adoption of double-blind procedures across psychology. The 1976 Irvington edition is the standard scholarly text.

Thomas S. Kuhn — The Structure of Scientific Revolutions (1962)

Kuhn, Thomas S. The Structure of Scientific Revolutions. 4th ed. Chicago: University of Chicago Press, 2012

Kuhn's The Structure of Scientific Revolutions, published by University of Chicago Press in 1962 and in a fourth edition in 2012, is not a psychology text but the most influential work in the philosophy of science for understanding psychology's disciplinary development. Kuhn's concepts of paradigm, normal science, and scientific revolution provided psychologists with a framework for understanding the behaviorist-to-cognitive transition and for the ongoing debates about psychology's paradigmatic status. The fourth edition with an introduction by Ian Hacking is the standard scholarly text.

John P. A. Ioannidis — Why Most Published Research Findings Are False (2005)

Ioannidis, John P. A. Why Most Published Research Findings Are False. PLOS Medicine 2, no. 8 (2005): e124

Ioannidis's 'Why Most Published Research Findings Are False,' published in PLOS Medicine in 2005, is the paper that launched the replication crisis in psychology and medicine. Ioannidis's mathematical argument that low statistical power, publication bias, and multiple testing virtually guarantee that most published findings in fields like psychology are false positives has driven the methodological reform movement in experimental psychology. Essential for any contemporary collection and the necessary historical context for understanding the Open Science Collaboration's 2015 replication study. Standard citation is PLOS Medicine 2(8), 2005: e124.

Joseph P. Simmons, Leif D. Nelson, and Uri Simonsohn — False-Positive Psychology (2011)

Simmons, Joseph P., Leif D. Nelson, and Uri Simonsohn. False-Positive Psychology: Undisclosed Flexibility in Data Collection and Analysis Allows Presenting Anything as Significant. Psychological Science 22, no. 11 (2011): 1359–1366

Simmons, Nelson, and Simonsohn's 'False-Positive Psychology: Undisclosed Flexibility in Data Collection and Analysis Allows Presenting Anything as Significant,' published in Psychological Science in 2011, is the most practically consequential paper in the methodological reform literature. The authors demonstrate through simulation that standard researcher degrees of freedom – flexibility in data collection, analysis, and reporting – dramatically inflate false-positive rates and can produce significant results for any hypothesis. The paper launched the p-hacking debate and drove the adoption of pre-registration as a methodological safeguard. Cite as Psychological Science 22(11), 2011: 1359–1366.

William R. Shadish, Thomas D. Cook, and Donald T. Campbell — Experimental and Quasi-Experimental Designs for Generalized Causal Inference (2002)

Shadish, William R., Thomas D. Cook, and Donald T. Campbell. Experimental and Quasi-Experimental Designs for Generalized Causal Inference. Boston: Houghton Mifflin, 2002

Shadish, Cook, and Campbell's Experimental and Quasi-Experimental Designs for Generalized Causal Inference, published by Houghton Mifflin in 2002, is the successor to Campbell and Stanley's 1963 Experimental and Quasi-Experimental Designs for Research and the standard reference for experimental and quasi-experimental methodology in psychological research. The work's comprehensive treatment of internal and external validity, the taxonomy of threats to causal inference, and the analysis of quasi-experimental designs has shaped how psychologists design and evaluate research across subfields.

Geoff Cumming — Understanding the New Statistics (2012)

Cumming, Geoff. Understanding the New Statistics: Effect Sizes, Confidence Intervals, and Meta-Analysis. New York: Routledge, 2012

Cumming's Understanding the New Statistics: Effect Sizes, Confidence Intervals, and Meta-Analysis, published by Routledge in 2012, is the most accessible and practically useful presentation of the estimation approach to statistical inference that has been proposed as an alternative to null hypothesis significance testing. Cumming argues that psychologists should abandon the dichotomous significant/not significant framework in favor of effect sizes with confidence intervals, and he provides the tools and the reasoning for doing so. Essential for collections documenting the statistical reform movement in experimental psychology.

Scott E. Maxwell, Michael Y. Lau, and George S. Howard — Is Psychology Suffering from a Replication Crisis? (2015)

Maxwell, Scott E., Michael Y. Lau, and George S. Howard. Is Psychology Suffering from a Replication Crisis? What Does 'Failure to Replicate' Really Mean? American Psychologist 70, no. 6 (2015): 487–498

Maxwell, Lau, and Howard's 'Is Psychology Suffering from a Replication Crisis? What Does 'Failure to Replicate' Really Mean?,' published in American Psychologist in 2015, provides the most careful analysis of what the replication crisis actually demonstrates and what it does not. The authors distinguish between failures to replicate due to false original findings and failures due to low power in the replication attempt, and they show that the replication rate would be substantially lower than 100% even if all original findings were true. Essential for understanding the methodological debate surrounding the replication crisis. Cite as American Psychologist 70(6), 2015: 487–498.

Daniël Lakens — Calculating and Reporting Effect Sizes to Facilitate Cumulative Science (2013)

Lakens, Daniël. Calculating and Reporting Effect Sizes to Facilitate Cumulative Science: A Practical Primer for t-Tests and ANOVAs. Frontiers in Psychology 4 (2013): article 863

Lakens's 'Calculating and Reporting Effect Sizes to Facilitate Cumulative Science: A Practical Primer for t-Tests and ANOVAs,' published in Frontiers in Psychology in 2013, is the most widely cited practical guide to effect size calculation in contemporary psychology. The paper provides worked examples for Cohen's d, Hedges' g, and partial eta-squared, with code in R and a freely available spreadsheet tool. Essential for any methodology collection and for graduate-level research training. Cite as Frontiers in Psychology 4, 2013: 863.

Andrew Gelman and Eric Loken — The Statistical Crisis in Science (2014)

Gelman, Andrew, and Eric Loken. The Statistical Crisis in Science. American Scientist 102, no. 6 (2014): 460–465

Gelman and Loken's 'The Statistical Crisis in Science,' published in American Scientist in 2014, provides the clearest non-technical account of the garden of forking paths problem – the way in which undisclosed researcher degrees of freedom generate inflated false-positive rates even without deliberate p-hacking. The paper argues that the multiple implicit choices researchers make in data collection and analysis – about outliers, covariates, stopping rules, and outcome measures – collectively produce results that are not reproducible even when no fraud is involved. The concept of the garden of forking paths has become standard in methodological reform discussions. Cite as American Scientist 102(6), 2014: 460–465.

Paul E. Meehl — Why Summaries of Research on Psychological Theories Are Often Uninterpretable (1990)

Meehl, Paul E. Why Summaries of Research on Psychological Theories Are Often Uninterpretable. Psychological Reports 66, no. 1 (1990): 195–244

Meehl's 'Why Summaries of Research on Psychological Theories Are Often Uninterpretable,' published in Psychological Reports in 1990 (vol. 66), is the most prescient diagnosis of the methodological problems that would generate the replication crisis two decades later. Meehl argues that the combination of low theoretical precision, NHST, and the crud factor (the tendency of all psychological variables to correlate with all others to some degree) makes it virtually impossible to determine from the research literature whether any psychological theory is true. Essential for collections documenting the philosophical critique of psychological methodology.

Eric-Jan Wagenmakers and colleagues — Bayesian Inference for Psychology (2018)

Wagenmakers, Eric-Jan, Maarten Marsman, Tahira Jamil, Alexander Ly, Josine Verhagen, Jonathan Love, Ravi Selker, Quentin F. Gronau, Martin Šmíra, Sacha Epskamp, Dora Matzke, Andrew Ly, Jeffrey N. Rouder, and Richard D. Morey. Bayesian Inference for Psychology. Psychonomic Bulletin and Review 25, no. 1 (2018): 35–57

Wagenmakers and colleagues' 'Bayesian Inference for Psychology,' published in Psychonomic Bulletin and Review in 2018, is the most comprehensive case for replacing frequentist null hypothesis significance testing with Bayesian methods in psychological research. The paper addresses the practical objections to Bayesian inference, demonstrates the advantages of the Bayes factor over the p-value for both confirming and disconfirming hypotheses, and provides guidance for implementation. The Bayesian reform movement is one of the most significant developments in contemporary experimental psychology methodology. Cite as Psychonomic Bulletin and Review 25(1), 2018.

Brian A. Nosek, Charles R. Ebersole, Alexander C. DeHaven, and David T. Mellor — The Preregistration Revolution (2018)

Nosek, Brian A., Charles R. Ebersole, Alexander C. DeHaven, and David T. Mellor. The Preregistration Revolution. Proceedings of the National Academy of Sciences 115, no. 11 (2018): 2600–2606

Nosek and colleagues' 'The Preregistration Revolution,' published in Proceedings of the National Academy of Sciences in 2018, is the definitive statement of the case for pre-registration as the principal methodological reform addressing the replication crisis. The paper argues that distinguishing hypothesis-generating (exploratory) from hypothesis-testing (confirmatory) research through pre-registration of study designs, hypotheses, and analysis plans is the most effective single intervention for improving the credibility of psychological science. Cite as PNAS 115(11), 2018: 2600–2606.