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Dr. Nick Perham, a lecturer in the School of Health Sciences at the University of Wales Institute, Cardiff, conducted a 2010 study, "Can preference for background music mediate the irrelevant sound effect?", that shows how music can interfere with short-term memory performance. Perham had subjects conduct a certain task, in this case recalling a series of numbers, while listening to different kinds of background music. If sound exhibits acoustical variations, or what Perham calls an "acute changing-state," performance is impaired. Steady-state sounds with little acoustical variation don't impair performance nearly as much. Perham asked his subjects how they thought they performed when exposed to different tastes in music. Each reported performing much worse when listening to disliked music, although the study's results showed no difference. However, Perham found no distinction in performance, regardless of whether the music was liked or disliked: both were "worse than the quiet control condition. Both impaired performance on serial-recall tasks." The interviewer queried how curious how prevalent serial-recall is in everyday life, and if one could get by without developing this skill. Unlikely, Perham says, as one would have tremendous difficulty recalling phone numbers, doing mental arithmetic, and even learning languages. "Requiring the learning of ordered information has also been found to underpin language learning. If you consider language, learning syntax of language, learning the rules that govern how we put a sentence together, all of these require order information . . . " Perham says.

Research shows that under some conditions, music actually improves our performance, while in other situations music makes it worse - sometimes dangerously so. Absorbing and remembering new information is best done with the music off, suggests a 2010 study published in Applied Cognitive Psychology. Nick Perham, the British researcher who conducted the study, notes that playing music you like can lift your mood and increase your arousal - if you listen to it before getting down to work. But it serves as a distraction from cognitively demanding tasks. Music might enhance performance if a well-practiced expert, e.g. a surgeon, needs to achieve the relaxed focus necessary to execute a job he's done many times before, but not all physicians in the operating room agree re: the benefits of music. A study of anaesthetists suggested that many felt that music distracted them from carrying out their expected tasks. Another study found that singing or listening to music while operating a simulated car increased drivers' mental workload and slowed responses to potential hazards, leading them to scan their visual field less often and to focus instead on the road right in front of them. Other iPod rules drawn from the research: Classical or instrumental music enhances mental performance more than music with lyrics. Music can make rote or routine tasks (think folding laundry or filing papers) less boring and more enjoyable. Runners who listen to music go faster. But when you need to give learning and remembering your full attention, silence is golden.

Nick Perham, a psychology researcher who conducted a major study on music and reading comprehension, gives a summary of music's effect on productivity. Whether it is beneficial or not is dependent on task and the timing of the music.While recent research has found that music can have beneficial effects on creativity, with other areas of performance, the impact of background music is more complicated. Performance is poorer when a task is undertaken in the presence of background sound (irrelevant sound that you are ignoring), in comparison to quiet: this is known as the irrelevant sound effect. The irrelevant sound effect phenomenon arises from attempting to process two sources of ordered information at the same time - one from the task and one from the sound. Unfortunately, only the former is required to successfully perform the serial recall task, and the effort expended in ensuring that irrelevant order information from the sound is not processed actually impedes this ability. A similar conflict is also seen when reading while in the presence of lyrical music. In this situation, the two sources of words - from the task and the sound - are in conflict. The subsequent cost is poorer performance of the task in the presence of music with lyrics. It doesn't matter whether one likes the music or not--performance was equally poor. Whether having music playing in the background helps or hinders performance depends on the task and on the type of music, and only understanding this relationship will help people maximise their productivity levels. If the task requires creativity or some element of mental rotation, then listening to music one likes can increase performance. In contrast, if the task requires one to rehearse information, then quiet is best, or, in the case of reading comprehension, quiet or instrumental music. One promising area of the impact of music on cognitive abilities stems from actually learning to play a musical instrument. Studies show that child