SA21. Firstly, explain the two major concerns regarding ecological validity according to Kvavilashvili & Ellis (2004). Secondly, explain how those concerns might play a role in how we interpret the research of Godden & Baddeley (1975) and the research of Koppel & Berntsen (2016).

SA22. Explain the key aspects of Marslen-Wilson & colleagues' Cohort Model. Explain an example of a research finding that the Cohort Model explains well, and why, and explain an example of research finding that the Cohort Model is less able to explain.