Sport Relief night of fundraising was held on Friday 14 March and the Sport Relief Miles took place all around the UK on Sunday 16 March. It was presented on stage by Richard Hammond, Gary Lineker & Davina McCall. Bruce Forsyth & Tess Daly presented "Sport Relief Does Strictly Come Dancing". Richard Hammond, Jeremy Clarkson & James May presented "Top Ground Gear Force". Jimmy Carr presented A Question of Sport Relief with the team captains Sue Barker and Gary Lineker. Sir Alan Sugar presented Sport Relief Does The Apprentice. There were occasional appearances by Jonathan Ross, Jimmy Carr, Sir Michael Parkinson, Patrick
Challenge point framework surgeons). The optimal challenge point represents the degree of functional task difficulty an individual of a specific skill level would need to optimize learning (Guadagnoli and Lee 2004). However, this learning depends on the amount of interpretable information. Therefore, although increases in task difficulty may increase learning potential, only so much is interpretable, and task performance is expected to decrease. Thus, an optimal challenge point exists when learning is maximized and detriment to performance in practice is minimized. With increased practice it is assumed that one's information-processing capabilities will increase (Marteniuk 1976). Therefore, the optimal challenge point will change as