What is Gestalt psychology?

Gestalt psychology is a school of thought that looks at the human mind and behaviour as a whole. Originating in the work of Max Wertheimer, Gestalt psychology formed partially as a response to the structuralism of Wilhelm Wundt. The development of this area of psychology was influenced by a number of thinkers, including Immanuel Kant, Ernst Mach and Johann Wolfgang von Goethe. The word Gestalt in German literally means "shape" or "figure."

• Wilhelm Wundt is best known for establishing the first psychology lab in Liepzig, Germany, generally considered the official beginning of psychology as a field of science separate from philosophy and physiology. In addition to this accomplishment, Wundt also established the psychology journal Philosophical Studies. Structuralism was the first school of psychology and focused on breaking down mental processes into the most basic components. Researchers tried to understand the basic elements of consciousness using a method known as introspection. By today’s scientific standards, the experimental methods used to study the structures of the mind were too subjective—the use of introspection led to a lack of reliability in results.
• Other critics argue that structuralism was too concerned with internal behaviour, which is not directly observable and cannot be accurately measured.

Gestalt psychology is a theory of mind and brain that proposes that the operational principle of the brain is holistic (meaning that “the whole is more than the sum of its parts”, that is the idea that all the properties of a given system (biological, chemical, social, economic, mental, linguistic, etc.) cannot be determined or explained by its component parts alone. Instead, the system as a whole determines in an important way how the parts behave. Therefore, reductionism is sometimes seen as the opposite of holism.), parallel, and analogue, with self-organizing tendencies; or, that the whole is different from the sum of its parts. The Gestalt effect refers to the form-forming capability of our senses, particularly with respect to the visual recognition of figures and whole forms instead of just a collection of simple lines and curves.

"The fundamental "formula" of Gestalt theory might be expressed in this way,” Max Wertheimer wrote in 1924. “There are wholes, the behaviour of which is not determined by that of their individual elements, but where the part-processes are themselves determined by the intrinsic nature of the whole. It is the hope of Gestalt theory to determine the nature of such wholes.”

Have you ever noticed how a series of flashing lights often appears to be moving, such as neon signs or strands of Christmas lights? According to Gestalt psychology, this apparent movement happens because our minds fill in missing information. This belief that the whole is greater than the sum of the individual parts led to the discovery of several different phenomena that occur during perception. Based upon this belief, Gestalt psychologists developed a set of principles to explain perceptual organization, or how smaller objects are grouped to form larger ones. These principles are often referred to as the “laws of perceptual organization.”

Prägnanz (German. n. conciseness, concision, quality of being brief and comprehensive, succinctness) is the fundamental principle of gestalt perception, also referred to as the law of prägnanz, which says that we tend to order our experience in a manner that is regular, orderly, symmetric, and simple. According to Robert Sternberg (See Cognitive Psychology, 3rd Ed., Thomson Wadsworth© 2003), Gestalt psychologists attempt to discover refinements of the law of prägnanz, and this involves writing down laws which hypothetically allow us to predict the interpretation of sensation, what are often called “gestalt laws.” However, it is important to note that while Gestalt psychologists call these phenomena “laws,” a more accurate term would be “principles of perceptual organization.” These principles are much like heuristics, which are mental shortcuts for solving problems. You will find below some of the different ‘Gestalt laws’ of perceptual organization, with the law of Prägnanz being the most general law.

Law of Prägnanz

The law of Pragnanz is sometimes referred to as the law of good figure or the law of simplicity. This law holds that objects in the environment are seen in a way that makes as simple as possible. According to the law, we are innately driven to experience things in as good a gestalt as possible. “Good” can mean many things here, such a regular, orderly, simplicity, symmetry, and so on, which then refer to specific gestalt laws. For example, a set of dots outlining the shape of a star is likely to be perceived as a star, not as a set of dots. We tend to complete the figure, make it the way it “should” be, finish it. Like we somehow manage to see this as a "B"...

One very important aspect of Prägnanz is figure – ground relationship. This aspect is often elaborated as an extension of general law of Prägnanz or the law of similarity. Camouflage has a direct bearing on figure-ground relationship.

However, it was Edgar Rubin, a Danish psychologist, who was the first to systematically investigate the figure-ground phenomenon. The phenomenon captures the idea that in perceiving a visual field, some objects take a prominent role (the figures) while others recede into the background (the ground). The visual field is thus divided into these two basic parts. This effect is often used by smart logo makers, as in the three figures suggest: The logo of visitnorway.com (see figure left-above) can be viewed as both three separate elements of blue, green and navy colour. It may, however, also be viewed as a person stretching his/her arms into the air. Similarly, the logo of the Gnome Desktop Environment (see figure on the right) can be viewed as both a "G" and a footprint. Lastly, the Macintosh logo (see figure below)be viewed as a regular happy face and a happy face in profile (looking at a computer screen).

Common to these logos is that you can focus on only one "interpretation" at a time; you cannot observe both the figure and ground at the same time, as ground will become figure when shifting the focus.

It should be noted that the figure-ground is most often exemplified using the Rubin Face/Vase Illusion, named after Edgar Rubin.

Law of Closure

According to the law of closure, things are grouped together if they seem to complete some entity. Our minds often ignore contradictory information and fills in gaps in information. In other words, the mind may experience elements it does not perceive through sensation, in order to complete a regular figure (that is, to increase regularity) i.e. the law of closure says that, if something is missing in an otherwise complete figure, we will tend to add it. A triangle, for example, with a small part of its edge missing, will still be seen as a triangle. We will “close” the gap.

In other words, the law of closure posits that we perceptually close up, or complete, objects that are not, in fact, complete. In the figure on the left the letters 'I', 'B', and 'M' although the shapes we see, in fact, are only lines of white space of differing length hovering above each other.

Similarly, we see the figure on Paul Thagard's book (see figure on the left) as forming a three-dimensional box although all we see, in fact, is 24 dissimilar red shapes (count for yourself!) on a dark red background. The figure above is the typical textbook example of the law of closure; we perceive a circle and not 8 individual circles.

The Gestalt approach can be said to be a "bottom-up" theory as it starts from the bottom (the aspects of the stimuli that influence perception) and work its way up to higher-order cognitive processes. An example of another bottom-up theory (of perception) that is well-known in the HCI community is James Gibson's theory of "direct perception" (see affordances and perception).

Law of Similarity

The law of similarity holds that things which are similar in some way appear to be grouped together. Grouping can occur in both visual and auditory stimuli. In other words, the mind groups similar elements into collective entities or totalities. This similarity might depend on relationships of form, color, size, or brightness. According to the law, we will tend to group similar items together, to see them as forming a gestalt, within a larger form. Here is a simple typographic example:

OXXXXXXXXX
XOXXXXXXXX
XXOXXXXXXX
XXXOXXXXXX
XXXXOXXXXX
XXXXXOXXXX
XXXXXXOXXX
XXXXXXXOXX
XXXXXXXXOX
XXXXXXXXXO

It is just natural for us to see the o’s as a line within a field of x’s.

Law of Proximity

According to the law of proximity, things that are near each other seem to be grouped together. In other words, spatial or temporal proximity of elements may induce the mind to perceive a collective or totality i.e., things that are close together as seen as belonging together. For example:

**************

**************

**************

You are much more likely to see three lines of close-together *’s than 14 vertical collections of 3 *’s each.

The law of proximity posits that when we perceive a collection of objects, we will see objects close to each other as forming a group. In figure on the left, we perceive the MTV logo and the logo for the Europe Music Awards as forming a group in the top left corner and the logos of the sponsors as forming a group in the bottom right corner. The white space separating the two groups of logos is used to indicate 'grouping', and the proximity of the logos of each groups is thus used to this end. Thus, a semantic separation of 'organisers' from 'sponsors' is achieved via structuring the graphical layout in accordance with this simple principle of perceptual organisation.

Figure, see on the right, is taken from Kazaa Media Desktop, where the law of proximity is used in designing the user interface of the popular peer-to-peer (P2P) software. As shown by the screen dump, the user can choose between P2P and web search. The group of radio buttons underneath are only associated with the P2P search and not the web search. To signal this association to the user, the vertical row of radio buttons are placed comparatively closer to the P2P-search radio button. Figure below is a typical textbook example, exemplifying how the law of proximity groups the items into 3 groups as opposed to 8 individual items.

Law of Symmetry

According to the law, symmetrical images are perceived collectively, even in spite of distance. The law of symmetry captures the idea that when we perceive objects we tend to perceive them as symmetrical shapes that form around their centre. Most objects can be divided in two more or less symmetrical halves and when for example we see two unconnected elements that are symmetrical, we unconsciously integrate them into one coherent object (or percept). The more alike objects are, they more they tend to be grouped.

In the figure on the left, CSC Finland's logo is perceived as an integral whole although the two constituent geometrical shapes seem to be pointing in different directions and have differing colours.

A typical textbook example of the law of symmetry (see figure on the right-below), consists of a configuration of a number of brackets. When perceiving the configuration, we see three pairs of symmetrical brackets as opposed to 6 individual brackets, or two pairs and two singles. This happens despite what is suggested by some of the brackets immediate proximity to each other. Despite the pressure of proximity to group the brackets nearest each other together, symmetry overwhelms our perception and makes us see them as pairs of symmetrical brackets.

Law of Continuity

The law of continuity holds that points that are connected by straight or curving lines are seen in a way that follows the smoothest path. Rather than seeing separate lines and angles, lines are seen as belonging together. That is to say that the mind continues visual, auditory, and kinetic patterns.

When we can see a line, for example (as in figure on the left), as continuing through another line, rather than stopping and starting, we will do so, as in this example, which we see as composed of two lines, not as a combination of two angles.

Law of Common Fate

According to this law, elements with the same moving direction are perceived as a collective or unit. The law of common fate states that when objects move in the same direction, we tend to see them as a unit. In the other words, the law of common fate is a Gestalt principle of organization holding that aspects of perceptual field that move or function in a similar manner will be perceived as a unit.

Gestalt grouping laws do not seem to act independently. Instead, they appear to influence each other, so that the final perception is a combination of the entire Gestalt grouping laws acting together. Gestalt theory applies to all aspects of human learning, although it applies most directly to perception and problem-solving. The law of common fate is one of the visual perception laws as theorized by gestalt psychologists. Paul Martin Lester, the author of Visual Communication, an expert in the field wrote: “the law of common fate…A viewer mentally groups five arrows or five raised hands pointing to the sky because they all point in the same direction. An arrow or a hand pointed in opposite direction will create tension, because the viewer will not see it as part of the upwardly directed whole."

Gestalt’s law of common fate is a pretty simple concept. It is basically referring to visual directional lines within a design or layout. In a photograph, if two or more people are moving in the same direction, they have created a directional line known as the law of common fate. Together, they have a common fate or destiny. Another example of the law of common fate could include similar shapes aimed in the same direction. You might wonder why the law of common fate is of importance to artists. First of all, when two objects (whether it be shapes or organic forms) are pointed in the same direction in a layout, the directional lines become dominant in a design. So, if two or more powerful shapes are aimed at or moving in a certain direction, an artist knows to put the message at the point of destination.

Directional lines push our eyes around a page. This can be a problem every bit as much as bonus. For instance, visual collisions frustrate the viewing audience. It can cause too much tension and cause anxiety for the reader which in turn, makes the layout uninviting and too intense.

If a candid photograph of a moving car is heading to the right, the law of common fate dictates that the directional line is pointing to the right. Then again, if a candid photograph of a car is aimed towards the left and the image is part of a design, the directional line is now aimed towards the left. Therefore, if a car is headed towards the right (on an image), the image of the car should be placed towards the left-hand side of a layout, because our eyes read from left to right. This is why the law of common fate is so important. The law of common fate should not be ignored in graphic designs and advertisements. Understanding the law of common fate and how directional lines work on layouts can make all the difference in how information is read and understood.

References:

1. http://edinburgh-gestalt-institute.moonfruit.com/#/whatisgestalt/4509313638
2. Vacche, Angela Dalle. (2003). The Visual Turn: Classical Film Theory and Art History. Rutgers University Press.
3. http://www.gisc.org/WhyCometoGISC/WhatisGestalt/tabid/57/Default.aspx
4. http://webspace.ship.edu/cgboer/gestalt.html
5. http://psychology.about.com/od/schoolsofthought/f/gestalt_faq.htm
6. http://psychology.about.com/od/sensationandperception/ss/gestaltlaws.htm
7. http://en.wikipedia.org/wiki/Gestalt_psychology
8. Lester, Paul Martin. (2005). Visual Communication: Images with Messages. Thomson Wadsworth.
9. http://www.interaction-design.org/encyclopedia/gestalt_principles_of_form_perception.html

Introduction to basic 'Structuralism' in Pscyhology

Question: What is structuralism?

Answer: Structuralism is general approach in various academic disciplines that seeks to explore the inter-relationships between some fundamental elements, upon which higher mental, linguistic, social, cultural etc "structures" are built, through which then meaning is produced within a particular person, system, culture.

Structuralism appeared in academic psychology for the first time in 19th century and then reappeared in the second half of the 20th century, when it grew to become one of the most popular approaches in the academic fields that are concerned with analyzing language, culture, and society. Ferdinand de Saussure is generally considered a starting point of the 20th century structuralism. As with any cultural movement, the influences and developments are complex.

Structuralism in psychology (19th century)At the turn of 19th century the founding father of experimental psychology Wilhelm Wundt tried to experimentally confirm his hypothesis that conscious mental life can be broken down into fundamental elements which then form more complex mental structures. Wundt's structuralism was quickly abandoned because it could not be tested in the same way as behavior, until now, when the brain-scanning technology can identify, for example, specialized brain cells that respond exclusively to basic lines and shapes and are then combined in subsequent brain areas where more complex visual structures are formed. This line of research in modern psychology is called cognitive psychology rather then structuralism because Wundt's term never ceased to be associated with the problem of observability.

Introduction to 'Psychology'

Question: What is Psychology?

Answer: Psychology is a collection of academic, clinical and industrial disciplines concerned with the explanation and prediction of behaviour, thinking, emotions, motivations, relationships, potentials and pathologies.

Psychology (Classical Greek: psyche = "soul" or "mind", logos = "study of") is an academic and applied field involving the study of behaviour, mind and thought and the underlying neurological bases of behaviour. Psychology also refers to the application of such knowledge to various spheres of human activity, including problems of individuals' daily lives and the treatment of mental illness. It is largely concerned with humans, although the behaviour and mental processes of animals can also be part of psychology research, either as a subject in its own right (e.g. animal cognition and ethology), or somewhat more controversially, as a way of gaining an insight into human psychology by means of comparison (including comparative psychology). Psychology is commonly defined as the science of behaviour and mental processes.

Psychology is conducted both scientifically and non-scientifically, but is to a large extent wholly rigorous. Mainstream psychology is based largely on positivism, using quantitative studies and the scientific method to test and disprove hypotheses, often in an experimental context. Psychology tends to be eclectic, drawing on scientific knowledge from other fields to help explain and understand behaviour. However, not all psychological research methods strictly follow the empirical positivism philosophy. Qualitative research utilizes interpretive techniques and is descriptive in nature, enabling the gathering of rich clinical information unattainable by classical experimentation. Some psychologists, particularly adherents to humanistic psychology, may go as far as completely rejecting a scientific approach, viewing psychology more as an art rather than a rigid science. However, mainstream psychology has a bias towards the scientific method, which is reflected in the dominance of cognitivism as the guiding theoretical framework used by most psychologists to understand thought and behaviour.

Psychology does not necessarily refer to the brain or nervous system and can be framed purely in terms of phenomenological or information processing theories of mind. Increasingly, though, an understanding of brain function is being included in psychological theory and practice, particularly in areas such as artificial intelligence, neuropsychology, and cognitive neuroscience. Psychology is distinct from, though related to, psychiatry, the branch of medicine which treats mental illness.

Psychology differs from sociology, anthropology, economics, and political science, in part, by studying the behaviour of individuals (alone or in groups) rather than the behaviour of the groups or aggregates themselves. Although psychological questions were asked in antiquity (see Aristotle's De Memoria et Reminiscentia or "On Memory and Recollection"), psychology emerged as a separate discipline only recently. The first person to call himself a "psychologist", Wilhelm Wundt, opened the first psychological laboratory in 1879.

Question: What do you understand by term Modern Psychology?

Answer: The majority of mainstream psychology is based on a framework derived from cognitive psychology, although the popularity of this paradigm does not exclude others, which are often applied as necessary. Psychologists specialising in certain areas, however, may use the dominant cognitive psychology only rarely if at all.

The testing of different aspects of psychological function is a significant area of contemporary psychology. Psychometric and statistical methods predominate, including various well-known standardised tests as well as those created ad hoc as the situation or experiment requires.

Academic psychologists may focus purely on research and psychological theory, aiming to further psychological understanding in a particular area, while other psychologists may work in applied psychology to deploy such knowledge for immediate and practical benefit. However, these approaches are not mutually exclusive and most psychologists will be involved in both researching and applying psychology at some point during their work. Clinical psychology, among many of the various discipline of psychology, aims at developing in practicing psychologists’ knowledge of and experience with research and experimental methods which they will continue to build up as well as employ as they treat individual with psychological issues or use psychology to help others.

Contemporary psychology is broad-based and consists of a diverse set of approaches, subject areas, and applications. A comprehensive list is given in the Topics and Divisions sections below. Where an area of interest is considered to need specific training and specialist knowledge (especially in applied areas), psychological associations will typically set up a governing body to manage training requirements. Similarly, requirements may be laid down for university degrees in psychology, so that students acquire an adequate knowledge in a number of areas. Additionally, areas of practical psychology, where psychologists offer treatment to others, may require that psychologists be licensed by government regulatory bodies as well.

While the exact divisions may vary between different countries or institutions, the following areas are usually considered as core subjects or approaches by psychology societies and universities.

Question: What is Cognitive Psychology?

Answer: Cognitive psychology is the psychological science which studies cognition, the mental processes that are hypothesised to underlie behaviour. This covers a broad range of research domains, examining questions about the workings of memory, attention, perception, knowledge representation, reasoning, creativity and problem solving.

Cognitive psychology is radically different from previous psychological approaches in two key ways. 

It accepts the use of the scientific method, and generally rejects introspection as a valid method of investigation, unlike phenomenological methods such as Freudian psychology.

It posits the existence of internal mental states (such as beliefs, desires and motivations) unlike behaviourist psychology.

The school of thought arising from this approach is known as cognitivism.

Cognitive psychology is one of the more recent additions to psychological research, having only developed as a separate area within the discipline since the late 1950s and early 1960s (though there are examples of cognitive thinking from earlier researchers). The term came into use with the publication of the book Cognitive Psychology by Ulric Neisser in 1967. However the cognitive approach was brought to prominence by Donald Broadbent's book Perception and Communication in 1958. Since that time, the dominant paradigm in the area has been the information processing model of cognition that Broadbent put forward. This is a way of thinking and reasoning about mental processes, envisaging them like software running on the computer that is the brain. Theories commonly refer to forms of input, representation, computation or processing, and outputs.

This way of conceiving mental processes has pervaded psychology more generally over the past few decades, and it is not uncommon to find cognitive theories within social psychology, personality, abnormal psychology, developmental psychology; the application of cognitive theories in comparative psychology has led to many recent studies in animal cognition.

The information processing approach to cognitive functioning is currently being questioned by new approaches in psychology, such as dynamical systems, and the embodiment perspective.

Because of the use of computational metaphors and terminology, cognitive psychology was able to benefit greatly from the flourishing of research in artificial intelligence and other related areas in the 1960s and 1970s. In fact, it developed as one of the significant aspects of the inter-disciplinary subject of cognitive science, which attempts to integrate a range of approaches in research on the mind and mental processes.

Question: What is major criticism of Cognitive Psychology?

Answer: Cognitivism has been criticised in a number of ways. Phenomenologist and hermeneutic philosophers have criticised the positivist approach of cognitivism for reducing individual meaning to what they perceive as measurements stripped of all significance. 

They argue that by representing experiences and mental functions as measurements, cognitivism is ignoring the context (of contextualism) and, therefore, the meaning of these measurements. They believe that it is this personal meaning of experience gained from the phenomenon as it is experienced by a person (what Heidegger called being in the world) which is the fundamental aspect of our psychology that needs to be understood: therefore they argue that a context free psychology is a contradiction in terms. They also argue in favour of holism: that positivist method cannot be meaningfully used on something which is inherently irreducible to component parts. Hubert Dreyfus has been the most notable critic of cognitivism from this point of view. Humanistic psychology draws heavily on this philosophy, and practitioners have been among the most critical of cognitivism.

In the 1990s, various new theories emerged that challenged cognitivism and the idea that thought was best described as computation. Some of these new approaches, often influenced by phenomenological and post-modernist philosophy, include situated cognition, distributed cognition, dynamicism, embodied cognition, ecological psychology and critical psychology. Some thinkers working in the field of artificial life (for example Rodney Brooks) have also produced non-cognitivist models of cognition.

The idea that mental functions can be described as information processing models has been criticised by philosopher John Searle and mathematician Roger Penrose who both argue that computation has some inherent shortcomings which cannot capture the fundamentals of mental processes.

Penrose uses Gödel's incompleteness theorem (which states that there are mathematical truths which can never be proven in a sufficiently strong mathematical system; any sufficiently strong system of axioms will also be incomplete) and Turing's halting problem (which states that there are some things which are inherently non-computable) as evidence for his position.

Searle has developed two arguments, the first (well known through his Chinese Room thought experiment) is the 'syntax is not semantics' argument - that a program is just syntax, understanding requires semantics, therefore programs (hence cognitivism) cannot explain understanding. The second, which he now prefers but is less well known, is his 'syntax is not physics' argument - nothing in the world is intrinsically a computer program except as applied, described or interpreted by an observer, so either everything can be described as a computer and trivially a brain can but then this does not explain any specific mental processes, or there is nothing intrinsic in a brain that makes it a computer (program) - both points, he claims, refute cognitivism. Finally it is not clear to what extent cognitivists can respond to the problems of Ryle's Regress or the homunculus fallacy.