This chapter is an enquiry into whether we can predict whether a particular instance of variation at the syntactic level may reflect social stratification or not (Labov 1966, 1972, 1994). Therefore, a range of syntactic variables in Dutch has been examined that may reveal social correlations in the spontaneous speech of 67 speakers who were born, grew up, and still live in one particular locality. Most of the syntactic variables consist of variants associated with the local dialect and (codified) standard Dutch. The syntactic variables examined differ in frequency of occurrence, synonymy/functional equivalence, abstract properties, and presumably noticeability. The fact that the social stratification of various syntactic variables can be investigated by following the same speakers within one speech style, i.e. the sociolinguistic interview,L12 offers a unique opportunity to carefully discriminate the effects of similar socio-demographic factors on different types of syntactic variables. The overall result is that social stratification of syntactic variation can be predicted where syntax maps onto discourse. The outcome is dependent on the extent of duration of language contact situations, and interactions in which particular linguistic variables have become socially meaningful depending on the individual and the wider societal, political and ideological context.

This chapter reviews research on visual categorization in pigeons including (1) basic-level categories, members of which are perceptually similar to each other (e.g., car or chair), (2) subordinate-level categories representing a subclass of a basic level category (e.g.,office chair or sports car), and (3) superordinate-level categories comprising several basic-level categories (e.g., furniture or vehicle).Current research convincingly demonstrates pigeons’ ability to form these categories. Moreover, pigeons’ basic-level categories appear to be similar to those of humans. However, the extent of similarity between superordinate-level and subordinate-level categories in pigeons and humans is not yet clear.

The ways in which cultural groups vary from one another has long been a matter of everyday observation. The construction of valid and reliable measures of these differences remains problematic. Comparisons of survey responses rest on assumptions about the functional equivalence of translated items and of the assumptions that respondents make about the meaning of such surveys. This chapter explores the different possible levels of measurement equivalence. Psychological variables are most frequently latent rather than directly observable. Philosophers of science have discussed how best to address the challenges one faces when working with latent variables. If we are to claim that latent variables such as individualism or collectivism can account for particular differences between groups, specific counterfactual theorising is required as to the limiting circumstances under which such effects will or will not occur. At a more practical level, we can note that differences are frequently found in the characteristic survey response styles of respondents from different cultural groups, but decisions as to whether or when to discount such variations rest on answers to the more basic philosophical questions raised in the earlier section of this chapter.