Repertory grid technique

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Definitions

The repertory grid technique (RGT) is a method for eliciting personal constructs. It is based on George Kelly's Personal Construct Theory in 1955 and was also initially developed within this context. As methodology, it can be used in a variety fundamental and applied research projects. It is also popular outside academia e.g. in counseling and marketing.

Today, various variants of the global concpt seem to exist, some more complex than others. Also within "main stream" RGT, several kinds of elicitation methods to extract constructs and to analyse them exits.

Some definitions of RGT (emphasized text by DKS).

“The RGT (Kelly, 1955) originally stems from the psychological study of personality (see Banister et al., 1994; Fransella & Bannister, 1977, for an overview). Kelly assumed that the meaning we attach to events or objects defines our subjective reality, and thereby the way we interact with our environment. The idiosyncratic views of individuals, that is, the different ways of seeing, and the differences to other individuals define unique personalities. It is stated that our view of the objects (persons, events) we interact with is made up of a collection of similarity–difference dimensions, referred to as personal constructs. For example, ifweperceive two cars as being different, we may come up with the personal construct fancy–conservative to differentiate them. On one hand, this personal construct tells something about the person who uses it, namely his or her perceptions and concerns. On the other hand, it also reveals information about the cars, that is, their attributes.” (Hassenzahl & Wessler, 2000:444)

“[..]The “Repertory Grid” [...] is an amazingly ingenious and simple ideographic device to explore how people experience their world. It is a table in which, apart from the outer two columns, the other columns are headed by the names of objects or people (traditionally up to 21 of them). These names are also written on cards, which the tester shows to the subject in groups of three, always asking the same question: “How are two of these similar and the third one different?” [...] The answer constitutes a “construct”, one of the dimensions along which the subject divides up her or his world. There are conventions for keeping track of the constructs. When the grid is complete, there are several ways of rating or ranking all of the elements against all the constructs, so as to permit sophisticated analysis of core constructs and underlying factors (see Bannister and Mair, 1968) and of course there are programs which will do this for you.” (Personal Construct Psychology, retrieved 14:09, 26 January 2009 (UTC).)

“The Repertory Grid is an instrument designed to capture the dimensions and structure of personal meaning. Its aim is to describe the ways in which people give meaning to their experience in their own terms. It is not so much a test in the conventional sense of the word as a structured interview designed to make those constructs with which persons organise their world more explicit. The way in which we get to know and interpret our milieu, our understanding of ourselves and others, is guided by an implicit theory which is the result of conclusions drawn from our experiences. The repertory grid, in its many forms, is a method used to explore the structure and content of these implicit theories/personal meanings through which we perceive and act in our day-to-day existence.” (A manual for the repertory grid, retrieved 12:18, 26 January 2009 (UTC)).

“The term repertory derives, of course, from repertoire - the repertoire of constructs which the person had developed. Because constructs represent some form of judgment or evaluation, by definition they are scalar: that is, the concept good can only exist in contrast to the concept bad, the concept gentle can only exist as a contrast to the concept harsh. Any evaluation we make - when we describe a car as sporty, or a politician as right-wing, or a sore toe as painful - could reasonably be answered with the question 'Compared with what?' The process of taking three elements and asking for two of them to be paired in contrast with the third is the most efficient way in which the two poles of the construct can be elicited.”. (Enquire Within, Kelly's Theory Summarised), retrieved 12:18, 26 January 2009 (UTC).

“The repertory grid technique is used in many fields for eliciting and analysing knowledge and for self-help and counselling purposes.” (Repertory Grid Technique, retrieved 12:18, 26 January 2009 (UTC).)

Overview

Most repertory grid analyses use the following principle:

  • The designer has to select a series of elements that are representative of a topic. E.g. to analyze perception of teaching styles, the elements would be teachers. To analyze learning materials, the elements could be learning objects. To analyze perception of laptop functionalities, the elements are various laptop models.
  • The next step is knowledge elicitation of personal constructs. To understand how an individual perceives (understands/compares) these elements, scalar constructs about these elements then have to be elicitated. E.g. using the so-called triadic method, interviewed people will have to compare learning object A with B and C and then state in what regards they are being different. E.g. Pick the two teachers that are most similar and tell me why. then tell me how the third one is different. The output will be contrasted attributes (e.g. motivating vs. boring or organized vs. a mess). This procedure should be repeated until no more new constructs (words) come up.
  • These constructs are then reused to rate all the elements in a matrix (rating grid), usually on a simple five or seven point scale. A construct always has two poles, i.e. attribute pairs with two opposites.

According to Feixas and Alvarez, the repertory grid is applied in four basic steps: (1) The design phase is where the parameters that define the area of application are set out. (2) In the administration phase, the type of structured interview for grid elicitation and the resulting numerical matrix is defined. (3) The repertory grid data can then subjected to a variety of mathematical analyzes. (4) The structural characteristics of the construct system can then be described.

“The elements selected for the grid depend on which aspects of the interviewee's construing are to be evaluated. Elements can be elicited by either asking for role relations (e.g., your mother, employer, best friend) or by focusing on a particular area of interest. A market research study might, for example, use products representative of that market as elements (e.g., cleaning products, models of cars, etc.).”(http://www.terapiacognitiva.net/record/pag/man2.htm Design Phase])

“The type of rating method used (dichotomous, ordinal or interval) determines the type of mathematical analysis to be carried out as well as the the length and duration of the test administration. As before, the criteria for selection depend on the researcher's objectives and on the capacities of the person to be assessed.” (http://www.terapiacognitiva.net/record/pag/man2.htm Design Phase (2)])

According to Nick Milton (Repertory Grid Technique) the repertory grid technique includes four main stages.

  • In stage 1, elements to analyze (e.g. concepts or observable items such as a pedagogical designs or roles) are selected for the grid. A similar number of attributes that allow to characterize each element are also defined. These attributes should either be generated with an elicitation method or can be taken from previously elicitated knowledge.
  • In stage 2 each concept must be rated against each attribute.
  • In stage 3, a cluster analysis is performed on both the elements and the attributes. This will show similarities between elements or attributes.
  • In stage 4, the knowledge engineer walks the expert through the focus grid gaining feedback and prompting for knowledge concerning the groupings and correlations shown.

Elicitation methods

Elicitation methods can vary. The basic procedures are either monadic, dyadic or triadic.

  • In the 'monadic procedure, participants must describe an element with a single word or a short phrase. The the opposite of this term is asked.
  • In the dyadic procedure, the participant is asked to look at pairs of elements and tell if they are similar or dissimilar in some way. If they are judged dissimilar, he has to explain how, again with a single word or a short phrase and again also tell the opposite of this term. If they are judged similar, then he is asked to select a third and dissimilar element and then again explain similarities and dissimilarities with simple phrases.
  • The triadic procedure has been defined above, i.e. participants are given three elements, must identify two similar and a different one and then explain. The elements in each triad are usually randomly selected and then replaced for the next iteration.

The knowledge elicitation procedure can be stopped when the participant stops coming up with new constructs.

Phrases that emerge for similarities are called the similarity pole (also called emergent pole. The opposing pole is called constrast pole or implicit pole. Numerical scale then should be consistent, e.g. the emergent poles always must have either a high or a low score. Certain software can require a direction.

Ranking/rating of elements in a matrix also can be done with various procedures. Examples:

  • Rating: Participants must judge each element on a Likert-type scale, usually with five or seven points. E.g. Please rate yourself on the following scale or Please rate the comfort of this car model.
  • Ranking: Participants can be asked to rank each element with respect to a given construct. E.g. rank 10 learning management systems in terms of "easy to use - difficult to use". A system like Dokeos would rank higher than a system like WebCT.
  • Binary ranking: Yes/no with respect to the emergent (positive) pole

Feixas and Alvarez outline the three methods to elicit constructs like this:

A) Elicitation of constructs using triads of elements. This is the original method used by Kelly. It involves the presentation of three elements followed by the question, "How are two of these elements similar, and thereby different from a third element?" and then "How is the third element different from the other two?" [...] B) Elicitation of constructs using dyads of elements. Epting, Schuman and Nickeson (1971) argue that more explicit contrast poles can be obtained using only two elements at a time. This procedure usually involves an initial question such as, "Do you see these people as more similar or different?" This prompt can then be followed by questions of similarity such as, "How are these two elements alike?" or "What characteristics do these two elements share?" Questions referring to differences such as "How are these two elements different?" are also appropriate. [...]

C) Elicitation of constructs using single elements. Also known as monadic elicitation, this way of obtaining constructs is the most similar to an informal conversation. It consists in asking subjects to describe in their own words the "personality" or way of being of each of the elements presented. The interviewer's task is limited to writing down the constructs as they appear and then asking for the opposite poles.

Construction of repertory grid tables

An example

The following example was taken from Sarah J. Stein, Campbell J. McRobbie and Ian Ginns (2000) research on Preservice Primary Teachers' Thinking about Technology and Technology Education. We only will show parts of the tables (in order to avoid copyright problems).

“Following a process developed by Shapiro (1996), a Repertory Grid reflecting the views of the interviewed group about the technology design process was developed. The interview and survey responses were coded and categorised into a set of dipolar constructs (ten) consisting of terms and phrases commonly used by students about technology and the conduct of technology investigations (Table 1), and a set of elements (nine) of the technology process consisting of typical situations or experiences in the conduct of an investigation (Table 2). The Repertory Grid developed consisted of a seven point rating scale situated between pole positions on the individual constructs, one set for each element. A sample Repertory grid chart is shown in Table 3.”

Table 1
Repertory Grid - Constructs
Label Descriptor - One pole Descriptor - Opposite pole
a. Creating my own ideas Just following directions
b. Challenging, problematic, troublesome Easy, simple
c. Have some idea beforehand about the result Have no idea what will result
d. ... ...
Table 2
Repertory Grid - Elements
Label Descriptor
1. Selection of a problem for investigation by the participant
2. Identifying and exploring factors which may affect the outcome of the project
3 Decisions about materials and equipment may be needed
4. Drawing of plans may be involved
5. Building models and testing them may be required
Table 3
Sample Repertory Grid Chart
The following statement is a brief description of a typical experience you, as a participant, might have while conducting a design and technology project.
ELEMENT #1: Selection of a problem for investigation by the participant.
Rate this experience on the scale of 1 to 7 below for the following constructs, or terms and phrases, you may use when describing the steps in conducting a design and technology project. CIRCLE YOUR RESPONSE.
a. Creating my own ideas 1 2 3 4 5 6 7 a. Just following directions
b. Challenging, problematic, troublesome 1 2 3 4 5 6 7 b. Easy, simple
c. Have some idea beforehand about the result 1 2 3 4 5 6 7 c. Have no idea what will result
d. Using the imagination or spontaneous ideas 1 2 3 4 5 6 7 d. Recipe-like prescriptive work

All-in-one grids

Instead of presenting a new grid table for each element, one also could present participants a grid that includes the elements as a row. In this case, users have to insert numbers in the cells. This is difficult on paper, but a bit easier with a computer interface we believe.

However, if you have few elements, a paper version can be done easily. E.g. to analyse percpetion of different teachers, e.g. Steinkuehler and Derry's Repertory Grid tutorial provides the following example about teacher rating.

Similarity or
Emergent Pole
1
Elements
Contrast Pole
5
Prof. Apple Prof. Bean Prof. Carmel Prof. Dim Prof. Enuf Prof. Fly
approachable 1 1 5 4 5 1 intimidating
laid-back 3 3 1 1 1 1 task-master
challenging 4 2 3 1 2 5 unengaging
spontaneous
lecturer



scripted
lecturer
etc.


etc.
Two poles – the similarity or emergent pole and the contrast pole – are listed in columns at either end.
Elements (in the middle columns) are rated in terms of the extent to which they belong to either of the poles of a construct.
The ratings are placed in a row of the cells between the corresponding poles. The red dots indicate the elements used in each triad.

Analysis techniques

Individual grids can be analyzed using various statistical data reduction techniques on both rows and columns, e.g. cluster analysis, principal component analysis or methods like correspondence analysis for both.

A simple descriptive technique to look at multiple grids that use the same constructs (e.g. as in some marketing research or knowledge engineering) is to simply chart the values for each participant as graph between the poles (opposite attributes). Otherwise, with grids that differ between individuals, it gets more complicated ...

Software

Specialized software can do either or all of three things:

  1. Help to design repertory grids
  2. Help to administer repertory grids.
  3. Perform a series of analysis.

An alternative method is to do the first part "by hand", the second with a web-based survey manager tool and the last with a normal statistics package. Many statistics programs can do cluster analysis and component analysis. Correspondence analysis is less available. None of the specialized software below has been tested in depth (26 January 2009 - DKS)

List of Software

Commercial
  • Gridcore Correspondence analysis tool for grid data. Between euros 50 and 150.
  • GridLab (no link)
  • RepGrid (A free 15 elements/15 constructions) version is available)
Free
  • The Idiogrid (Win) program by James W. Grice. Idiographic Analysis with Repertory Grids. Free since 2008, but users that get funding are expected to pay 105 $US.
  • WinGrid (became a tool for artists).

Free online services

Repertory grid analysis in specific fields

Marketing

Training needs analysis

Peters (1994:23), in the context of management education, argued that “The real challenge underlying any training needs analysis (TNA) lies not with working out what training a group of individuals needs but with identifying what the good performers in that group actually do. It is only when you have a benchmark of good performance that you can look to see how everybody measures up”. Peters (1994:28) argued that use of repertory grids allows

  • It provides a means to capture subjective ideas and viewpoints and it helps people to focus their views and opinions.
  • It can help to probe areas and viewpoints of which managers may be unaware, and as such it can be a way of generating new managerial insights.
  • It helps individual managers to understand how they view good/poor performance.
  • It provides a representation of the manager's own world as it really is â and this in turn can help provide a clearer picture of how an organization is actually performing
  • The technique uses real people to identify real needs [..].
  • It does not seek to fit peopleâs training needs into existing [...] training plans. As a result, what can emerge is a definition of one or more areas of real weakness within a department or organization. [..]

Design and human computer interaction

Repertory grid analysis in human-computer interaction at large seems to be quite popular, e.g. we found design studies (Hassezahl and Wessler, 2000), search engine evaluation (Crudge & Johnson, 2004), models of text (Dillen and McKnight, 1990), elicitation of knowledge for expert systems (Shaw and Gaines, 1989)

Design of artifacts

The design problem described by Hassenzahl & Wessler was how to evaluate early prototypes made in parallel. “The user-based evaluation of artifacts in a parallel design situation requires an efficient but open method that produces data rich and concrete enough to guide design. (Hassenzahl & Wessler, 2000:453)”. Unstructured methods (e.g. interviews or observations) require a huge amount of work. On the opposite, structured methods like questionnaires is their "insensitivity to topics, thoughts, and feelings—in short, information— that do not fit into the predetermined structure." (idem, 442). “The most important advantages of the RGT are (a) its ability to gather design-relevant information, (b) its ability to illuminate important topics without the need to have a preconception of these, (c) its relative efficiency, and (d) the wide variety of types of analyses that can be applied to the gathered data. (Hasszenzahl & Wessler, 2000:455).”

Models of Text.

Dillen and McKnight (1990:Abstract) found that “individuals construe texts in terms of three broad attributes: why read them, what type of information they contain, and how they are read. When applied to a variety of texts these attributes facilitate a classificatory system incorporating both individual and task differences and provide guidance on how their electronic versions could be designed.”

Knowledge elicitation for expert systems

Mildred Shaw and Brian Gaines led several studies on knowledge elicitation. On particularly interesting problem was “hat experts may share only parts of their terminologies and conceptual systems. Experts may use the same term for different concepts, use different terms for the same concept, use the same term for the same concept, or use different terms and have different concepts. Moreover, clients who use an expert system have even less likelihood of sharing terms and concepts with the experts who produced it.” (Shaw & Gaines, 1989). The authors summarize the situation with the following figure.

File:Difference-experts-shaw-gaines
Consensus, conflict, correspondence and contrast among experts, Shaw, Mildred L G & Brian R Gaines (1989), reproduced without permission

.

The methodology for developing a methodology for eliciting and analyzing consensus, conflict, correspondence and contrast in a group of experts can be summarized as follows:

  1. The group of experts comes to an agreement over a set of entities which instantiate the relevant domain. E.g. the union of all entities that can be extracted from individual elicitations.
  2. Each expert individually elicits attributes and values for the agreed entities. We will then find either correspondance or contrast. All attributes of the individual grids are mapped. Does one expert have an attribute that can be used to make the same distinctions between the entities as does an other expert (correspondance) or does an attribute in one system have no matching attribute in the other (contrast).
  3. “In phase 3 each expert individually exchanges elicited conceptual systems with every other expert, and fills in the values for the agreed entities on the attributes used by the other experts. [...] The result is a map showing consensus when attributes with the same labels are used in the same way and conflict when they are not [..]”
  4. Depending on the purpose of the study, one then can for instance identify subgroups of experts who think and act in similar ways or negogitating a common solution if there is a need for it.
Web site Analysis


Links

Journals

Associations and centres

Links of links

Short introductions

Manuals

Bibliography

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