Experimental psychology in the context of Associative learning

Learning is the process of acquiring new understanding, knowledge, behaviors, skills, values, attitudes, and preferences. The ability to learn is possessed by humans, non-human animals, and some machines; there is also evidence for some kind of learning in certain plants. Some learning is immediate, induced by a single event (e.g. being burned by a hot stove), but much skill and knowledge accumulate from repeated experiences. The changes induced by learning often last a lifetime, and it is hard to distinguish learned material that seems to be "lost" from that which cannot be retrieved.

Human learning starts at birth (it might even start before) and continues until death as a consequence of ongoing interactions between people and their environment. The nature and processes involved in learning are studied in many established fields (including educational psychology, neuropsychology, experimental psychology, cognitive sciences, and pedagogy), as well as emerging fields of knowledge (e.g. with a shared interest in the topic of learning from safety events such as incidents/accidents, or in collaborative learning health systems). Research in such fields has led to the identification of various sorts of learning. For example, learning may occur as a result of habituation, or classical conditioning, operant conditioning or as a result of more complex activities such as play, seen only in relatively intelligent animals. Learning may occur consciously or without conscious awareness. Learning that an aversive event cannot be avoided or escaped may result in a condition called learned helplessness. There is evidence for human behavioral learning prenatally, in which habituation has been observed as early as 32 weeks into gestation, indicating that the central nervous system is sufficiently developed and primed for learning and memory to occur very early on in development.

The American Journal of Psychology is a journal devoted primarily to experimental psychology. It is the first such journal to be published in the English language (though Mind, founded in 1876, published some experimental psychology earlier). AJP was founded by the Johns Hopkins University psychologist Granville Stanley Hall in 1887. This quarterly journal has distributed several groundbreaking papers in psychology. The AJP investigates the science of behavior and the mind, releasing reports of original research based on experimental psychology, theoretical presentations, combined theoretical and experimental analyses, historical commentaries, and detailed reviews of well-known books.

In psychology, a stimulus is any object or event that elicits a sensory or behavioral response in an organism. In this context, a distinction is made between the distal stimulus (the external, perceived object) and the proximal stimulus (the stimulation of sensory organs).

• In perceptual psychology, a stimulus is an energy change (e.g., light or sound) which is registered by the senses (e.g., vision, hearing, taste, etc.) and constitutes the basis for perception.
• In behavioral psychology (i.e., classical and operant conditioning), a stimulus constitutes the basis for behavior. The stimulus–response model emphasizes the relation between stimulus and behavior rather than an animal's internal processes (i.e., in the nervous system).
• In experimental psychology, a stimulus is the event or object to which a response is measured. Thus, not everything that is presented to participants qualifies as stimulus. For example, a cross mark at the center of a screen is not said to be a stimulus, because it merely serves to center participants' gaze on the screen. Also, it is uncommon to refer to longer events (e.g. the Trier social stress test) as a stimulus, even if a response to such an event is measured.

Empirical psychology (German: empirische Psychologie) is the work of a number of nineteenth century German-speaking pioneers of experimental psychology, including William James, Wilhelm Wundt and others. It also includes several philosophical theories of psychology which based themselves on the epistemological standpoint of empiricism, e.g., Franz Brentano's Psychology from an Empirical Standpoint (1874).

Wallace Craig (1876–1954) was an American experimental psychologist and behavior scientist. He provided a conceptual framework for the study of behavior organization and is regarded as one of the founders of ethology. Craig experimentally studied the behavioral expression of emotion, the way innate and learned behavioral tendencies are integrated, and how vocal as well as social behaviors are organized. He encouraged a view of behavior as an integrated process with evolutionary, motivational, experiential, social and ecological degrees of freedom. This integrative perspective helped shape modern behavioral science.

Wilhelm Maximilian Wundt (/wʊnt/; German: [vʊnt]; 16 August 1832 – 31 August 1920) was a German physiologist, philosopher, professor, and one of the fathers of modern psychology. Wundt, who distinguished psychology as a science from philosophy and biology, was the first person to call himself a psychologist.

He is widely regarded as the "father of experimental psychology". In 1879, at the University of Leipzig, Wundt founded the first formal laboratory for psychological research. This marked psychology as an independent field of study.

Cognitive anthropology is a subfield of anthropology influenced by Linguistic anthropology, cultural anthropology, and biological anthropology in which scholars seek to explain patterns of shared knowledge, cultural innovation, and transmission over time and space using the methods and theories of the cognitive sciences (especially experimental psychology and cognitive psychology) often through close collaboration with historians, ethnographers, archaeologists, linguists, musicologists, and other specialists engaged in the description and interpretation of cultural forms. Cognitive anthropology is concerned with what people from different groups know and how that implicit knowledge, in the sense of what they think subconsciously, changes the way people perceive and relate to the world around them.

The philosopher Charles Sanders Peirce (1839–1914) did considerable work over a period of years on the classification of sciences (including mathematics). His classifications are of interest both as a map for navigating his philosophy and as an accomplished polymath's survey of research in his time. Peirce himself was well grounded and produced work in many research fields, including logic, mathematics, statistics, philosophy, spectroscopy, gravimetry, geodesy, chemistry, and experimental psychology.

Forensic psychology is the application of scientific knowledge and methods (in relation to psychology) to assist in answering legal questions that may arise in criminal, civil, contractual, or other judicial proceedings. Practitioners and researchers in the field may engage in various psychology-law topics, such as: jury selection, reducing systemic racism in criminal law between humans, eyewitness testimony and jury research, evaluating competency to stand trial, or assessing military veterans for service-connected disability compensation. The American Psychological Association's Specialty Guidelines for Forensic Psychologists reference several psychology sub-disciplines, such as: social, clinical, experimental, counseling, and neuropsychology.

Perceptual control theory (PCT) is a model of behavior based on the properties of negative feedback control loops. A control loop maintains a sensed variable at or near a reference value by means of the effects of its outputs upon that variable, as mediated by physical properties of the environment. In engineering control theory, reference values are set by a user outside the system. An example is a thermostat. In a living organism, reference values for controlled perceptual variables are endogenously maintained. Biological homeostasis and reflexes are simple, low-level examples. The discovery of mathematical principles of control introduced a way to model a negative feedback loop closed through the environment (circular causation), which spawned perceptual control theory. It differs fundamentally from some models in behavioral and cognitive psychology that model stimuli as causes of behavior (linear causation). PCT research is published in experimental psychology, neuroscience, ethology, anthropology, linguistics, sociology, robotics, developmental psychology, organizational psychology and management, and a number of other fields. PCT has been applied to design and administration of educational systems, and has led to a psychotherapy called the method of levels.

Experimental economics is the application of experimental methods to study economic questions. Data collected in experiments are used to estimate effect size, test the validity of economic theories, and illuminate market mechanisms. Economic experiments usually use cash to motivate subjects, in order to mimic real-world incentives. Experiments are used to help understand how and why markets and other exchange systems function as they do. Experimental economics have also expanded to understand institutions and the law (experimental law and economics).

A fundamental aspect of the subject is design of experiments. Experiments may be conducted in the field or in laboratory settings, whether of individual or group behavior.

Eugene Galanter (1924–2016) was one of the modern founders of cognitive psychology. He was an academic in the field of experimental psychology and an author. Dr. Galanter was Professor Emeritus of Psychology and Quondam Director of the Psychophysics Laboratory at Columbia University. He was also the co-founder, Chairman of the Board of Directors and Chief Scientific Officer of Children’s Progress, an award-winning New York City-based company that specializes in the use of computer technology in early education. The company's assessments and reports have been used in 40 states and 9 countries.

Gustav Theodor Fechner (/ˈfɛxnər/; German: [ˈfɛçnɐ]; 19 April 1801 – 18 November 1887) was a German physicist, philosopher, and experimental psychologist. A pioneer in experimental psychology and founder of psychophysics (techniques for measuring the mind), he inspired many 20th-century scientists and philosophers. He is also credited with demonstrating the non-linear relationship between psychological sensation and the physical intensity of a stimulus via the formula: ${\displaystyle S=K\ln I}$, which became known as the Weber–Fechner law.

Franz Beda Riklin (Swiss Standard German: [ˈrɪkliːn]; 22 April 1878, St. Gallen – 4 December 1938, Küsnacht) was a Swiss psychiatrist.

Early in his career, Franz Riklin worked at the Burghölzli Hospital in Zurich under Eugen Bleuler (1857–1939), and studied experimental psychology with Emil Kraepelin (1856–1926) and Gustav Aschaffenburg (1866–1944) in Heidelberg. Beginning in 1904, he was a physician at the psychiatric clinic in Rheinau. In 1910, Riklin became the first secretary of the International Psychoanalytic Association (IPA).

Ernst Heinrich Weber (/ˈwɛbər, ˈveɪbər/; German: [ˈveːbɐ]; 24 June 1795 – 26 January 1878) was a German physician who is considered one of the founders of experimental psychology.

Ernst Weber was born into an academic background, with his father serving as a professor at the University of Wittenberg. Weber became a doctor, specializing in anatomy and physiology. Two of his younger brothers, Wilhelm and Eduard, were also influential in academia, both as scientists with one specializing in physics and the other in anatomy. Ernst became a lecturer and a professor at the University of Leipzig and stayed there until his retirement.