Chapter 4 is the first of two chapters on the question whether a diet shift is socially desirable. It takes a behavioural perspective, whereas Chapter 5 is oriented towards processes at the level of organisations and markets. Accordingly, the main theme of the present chapter is how a diet shift is related to the behaviour of producers and consumers. The degree to which a shift “fits” into existing behavioural patterns is an important argument for its desirability. The same applies even more strongly to its future fit into the behavioural patterns of the next decades. Alternatively, whether a lack of fit will create an insurmountable problem depends on the feasibility of the measures that can be taken to mitigate the main shortcomings of the options.
To get more insight into the various influences on food choices, this chapter argues that human behaviour is a very flexible phenomenon and that each particular manifestation of it can be the result of many determinants. These determinants can be sorted into a logical order on the basis of the time frames that they involve. The fact that, for example, impulse buying has another time frame than consciously buying says something about the different underlying processes. Generally, the time frames that are relevant for behaviour range from short-term (i.e. taking less than a second) to long-term (i.e. taking almost a lifetime) and extremely long-term (i.e. taking many human generations).
The framework opens the way to look at influences on behaviour from various perspectives. This will be done in the next sections, which describe three consumer-oriented research projects. Section 4.2 takes a long-term view on behaviour; it starts at the level of distal processes and analyses the socio-cultural changes in society that can make a diet shift more attractive or less attractive to producers and consumers.In contrast, Sections 4.3 and 4.4 take a short-term view on behaviour; these projects start at the level of perceptual and rational processes to analyse consumers’ reactions to novel products.