0 6 . ▁ ▁In ▁addition ▁to ▁his ▁academic ▁work , ▁he ▁is ▁an ▁author ▁of ▁a ▁novel , ▁D irty ▁old ▁ras cal ▁( ), ▁a ▁fant asy ▁about ▁a ▁cook ▁set ▁in ▁the ▁strange ▁Castle ▁where ▁no ▁mis de ed ▁goes ▁un p un ished . ▁Har ley ▁has ▁published ▁an ▁article , ▁Why ▁the ▁earth ▁is ▁almost ▁flat : ▁Im aging ▁and ▁the ▁death ▁of ▁cogn itive ▁psych ology . ▁He ▁has ▁recently ▁performed ▁as ▁a ▁stand - up ▁com ic , ▁performing ▁at ▁the ▁Edinburgh ▁Fr inge ▁in ▁ 2 0 1 3 . ▁ ▁Research ▁Inter ests ▁Har ley ' s ▁current ▁main ▁research ▁interest ▁is ▁in ▁met ac ogn ition , ▁this ▁interest ▁grew ▁out ▁of ▁his ▁research ▁on ▁age ing ▁and ▁his ▁interest ▁in ▁conscious ness . ▁More ▁topics ▁about ▁his ▁research ▁on ▁met ac ogn ition ▁is ▁covered ▁in ▁his ▁forth coming ▁book , ▁C ogn ition : ▁The ▁mind ful ▁brain ▁- ▁why ▁we ▁behave ▁as ▁we ▁do . ▁Another ▁of ▁his ▁research ▁interest ▁includes ▁how ▁we ▁produce ▁language , ▁although ▁he ▁now ▁studies ▁this ▁in ▁the ▁wider ▁context ▁of ▁how ▁we ▁represent ▁meaning , ▁how ▁language ▁is ▁affected ▁by ▁brain ▁damage , ▁and ▁by ▁normal ▁and ▁path ological ▁age ing ▁( e . g . ▁Al z heimer ' s ▁and ▁Park inson ' s ▁dise ases ). ▁He ▁also ▁works ▁on ▁how ▁we ▁control ▁our ▁own ▁cogn ition , ▁and ▁how ▁this ▁ability ▁changes ▁with ▁age . ▁Under lying ▁all ▁his ▁research