Convergent Validity
There is evidence that in older children (3-year-olds) and adults,
the many varieties of false belief task all test for a single underlying competence
(Flynn, 2006, p. 650; Wellman, Cross, & Watson, 2001).
This is significant because there are many variants of false belief tasks which
differ, for example, in
whether participants are observers or interaction partners, and whether
the false belief concerns a location, a category or even essentially involves numerical identity.
Do we also have good evidence that the various false belief tasks designed for infants
all test for a single capacity?
‘implicit tasks suffer from a lack of convergent validity. Decades of
research with explicit ToM tasks have shown that tasks that differ
dramatically in surface features but share the same
meta-representational deep structure, such as various false-belief and
other meta-representational tasks [...], systematically converge.
Proficiency in the different tasks ontogenetically emerges in tandem, and
performance on the tasks is highly inter-correlated. By contrast, no
systematic correlations have been found between the different types of
implicit tasks, nor even within different tasks of the same type, all of
which are designed to tap the same underlying construct.’
(Rakoczy, 2022)
Further, Poulin-Dubois & Yott (2017) find evidence for divergence.
Disunity of Theory of Mind
Warnell & Redcay (2019) investigated a range of mindreading tasks with children
of different ages as well as adults.
They found
‘no clear structure underlying ToM emerged for any developmental period. [...]
ToM tasks were minimally correlated in early childhood, in middle childhood, and in adulthood
[...] ToM is a diverse construct that likely intersects with an array of other social and cognitive abilities
[...] The sophisticated understanding of others’ minds that underscores mature human social cognition
may be an emergent property of varied skills combined with certain social contexts.
Critical examination of how and why we measure ToM will offer insight [...] into cognition and behavior more broadly,
as the lack of convergence among conventional ToM measures in the current study suggests that
the best way forward in ToM research may be to take a step back.’
(Warnell & Redcay, 2019)
See also Beaudoin, Leblanc, Gagner, & Beauchamp (2020, p. 15):
‘The lack of theoretical structure and shared taxonomy in ToM definitions
and its underlying composition impedes our ability to fully integrate ToM in a
coherent and comprehensive framework linking it to various socio-cognitive
abilities, a pervasive issue observed across the domain of social cognition.’
Happé, Cook, & Bird (2017) and Beaudoin et al. (2020) both offer
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