learning-styles
learning-styles
learning-styles
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Myers and McCaulley (1985) report a test–retest<br />
reliability meta-analysis on a sample of 102,174<br />
respondents (Table 13) which appears to be robust.<br />
Boyle’s review (1995) notes that the best results<br />
(for Form F) are reported stability coefficients of<br />
between 0.69 (T-F) and 0.78 (E-I), which, though lower<br />
than those in Table 13, are still acceptable. Advocates<br />
who have interpreted MBTI retest scores positively<br />
(eg Carlson 1980, De Vito 1985, Murray 1990) have,<br />
according to Pittenger (1993), used trait judgement<br />
criteria, implying a continuum, rather than type<br />
criteria, reflecting the (allegedly) dichotomous nature<br />
of the scales. This criticism is repeated in reviews<br />
of Form M where it is accepted that MBTI scales<br />
show ‘very high levels of internal consistency<br />
(mostly >0.90) and acceptable [actually very high]<br />
levels of test–retest reliability (0.83–0.97 for a 4-week<br />
interval). However, the authors clearly state that<br />
the MBTI is meant to identify a person’s whole type<br />
(eg ENTP)’ (Fleenor 2001; see also Mastrangelo 2001).<br />
The evidence of whole-type stability from the manual<br />
(Myers and McCaulley 1985) appears to be a little<br />
less impressive, with 65% of respondents maintaining<br />
their type and most of the remaining 35% showing<br />
consistency in three out of four scales (n=424).<br />
The stability of the MBTI type allocations are open<br />
to question in part because the middle scores are<br />
prone to misinterpretation, since they are forced one<br />
way or the other, despite small numerical differences.<br />
For example, Howes and Carskadon (1979) found<br />
that for scores within 15 points of neutral, between<br />
25% and 32% of respondents had changed on the<br />
second test. A meta-analysis of reliability across<br />
210 recent studies (Capraro and Capraro 2002) notes<br />
that most authors of studies using the MBTI do not<br />
engage with issues of reliability at all; however, when<br />
reliability data was available, ‘the MBTI tended to yield<br />
acceptable score reliabilities’ (2002, 596) of around<br />
0.81 (standard deviation 0.08). In addition, Capraro<br />
and Capraro (2002, 599) emphasise that the reliability<br />
of an instrument is context-specific: ‘dependent<br />
on sample characteristics and testing conditions.’<br />
Indeed, while Salter, Evans and Forney (1997, 595)<br />
report ‘some stability (ranging from 0.69 to 0.77)’<br />
over 20 months, they warn that the impact of<br />
environmental factors on changes to individuals’<br />
MBTI scores is under-researched.<br />
A lot of work has been done comparing the MBTI<br />
to other scales, which can be summarised as follows.<br />
McCrae and Costa’s (1989) study indicates that<br />
there are correlations between the NEO-PI scales and<br />
the MBTI, despite the omission of neuroticism from<br />
the MBTI; while Furnham (1996a, 306) detects ‘clear<br />
overlap’, despite promoting the psychometric superiority<br />
of the NEO-PI.<br />
Drummond and Stoddard (1992, 103) note connections<br />
between the MBTI and the Gregorc Style Delineator,<br />
concluding that ‘the Gregorc measures some of the<br />
same dimensions as the Myers-Briggs but uses<br />
different labels’.<br />
Spirrison and Gordy (1994) find the Constructive<br />
Thinking Indicator predictive of scores on the MBTI.<br />
Lim (1994) found moderate relationships between<br />
introversion on the MBTI and abstract and reflective<br />
tendencies on Kolb’s LSI.<br />
Higgs (2001) was able to find only partial correlations<br />
between MBTI type and emotional intelligence.<br />
While there are many attempts to link and correlate<br />
the MBTI with other measures of <strong>learning</strong> style, some<br />
of these (eg Nordvik 1996; or see Di Tiberio 1996<br />
for an overview) seem to be predicated on the belief<br />
that if there are some modest correlations between,<br />
say, three disparate measures, they all somehow<br />
validate one another. Indeed, it could be argued that<br />
the theoretical descriptions of dimensions in the<br />
MBTI differ substantially from dimensions with similar<br />
names in other typologies, since the MBTI is the<br />
only one of these that remains firmly connected to<br />
Jung’s theoretical constructs. This suggests that the<br />
connections with other tests are not of themselves<br />
a good measure of the MBTI’s validity or relevance<br />
to the field of <strong>learning</strong> <strong>styles</strong>, since the field of <strong>learning</strong><br />
<strong>styles</strong> is beset with problems in terms of establishing<br />
shared definitions of key terms.<br />
The huge body of work which exists on the MBTI<br />
must be examined with the critical awareness that<br />
a considerable proportion (estimated to be between<br />
a third and a half of the published material) has<br />
been produced for conferences organised by the<br />
Center for the Application of Psychological Type<br />
or as papers for the Journal of Psychological Type,<br />
both of which are organised and edited by Myers-Briggs<br />
advocates. Pittenger (1993, 478) asserts that ‘the<br />
research on the MBTI was designed to confirm not<br />
refute the MBTI theory’. A good example of this is the<br />
study by Saggino, Cooper and Kline (2001), which<br />
starts from a position which assumes the validity<br />
of the MBTI and tests new versions of it against<br />
itself. As Mastrangelo (2001) argues, the ‘research<br />
[on the MBTI] need[s] to be presented in journals<br />
besides the Journal of Psychological Type … The most<br />
widely used psychological measure should demand<br />
scientific scrutiny to improve service to the public.’ 10<br />
10<br />
Page numbers are not available for online Buros reports from the<br />
Mental Measurements Yearbooks.