Sport Relief 2014 a number of run-up events and was presented by Gary Lineker, Davina McCall, David Walliams, Claudia Winkleman, Jack Whitehall, Fearne Cotton, Clare Balding and Gabby Logan. Stars including Davina McCall, David Tennant, Alex Jones, Gary Lineker, David Beckham, Little Mix and Kelly Hoppen presented appeal films. Little Mix recorded the official single "Word Up!" for this Sport Relief. TV programmes that led up to the main event included: Sport Relief 2014 Sport Relief 2014 is a fundraising event organised by Sport Relief. A number of run-up events took place and the main event consisted of a live telethon broadcast on
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