Publications on this issue started dwindling in the mid 1970s and remained scarce until Smyth and Marriott (1982) brought new impetus into the field by raising some interesting new questions. Their idea was to study ball-catching tasks by looking at the respective functions of proprioceptive and visual feedback from the effector segment, as well as the potential impact of the participant’s level of expertise (e.g. Savelsbergh and Whiting, 1988; Davids and Stratford, 1989). Although the theoretical basis remained the same, Smyth and Marriott’s (1982) work marked a turning point in the way the problem was approached. The goal now became to find out what, rather than how much, information was needed for successful performance (for a thorough review of this topic, see Savelsbergh, Whiting and Pijpers, 1992). This new outlook gave rise to many studies on ballcatching tasks aimed at determining what information is drawn from the environment (e.g. Rosengren, Pick and von Hofsten, 1988), what is obtained from the effector segment (e.g. Smyth and Marriott, 1982), and what comes from the
moving object itself (e.g. Savelsbergh, Whiting and Bootsma, 1991). This chapter looks solely at the information available in the moving object’s trajectory.