| Summary: | This essay is a study which is intended to explore how public service announcements in broadcast media use humour as a method of conveying their core messages in a manner which is both memorable and persuasive; to consider why humour is chosen as a strategy; and to identify the similarities and differences in the use of humour in PSAs and commercial broadcast advertising. Six video commercials were analysed in total: three PSAs and three advertisements. The analysis identified semantic and stylistic features including metaphors, puns, idioms, vagueness, polysemes, homonyms, homographs and homophones, as well as visual metaphors. It continued on to investigate how PSAs contextualise their messages, applying Grice's co-operative principle, as well as the principles of relevance, as proposed by Sperber and Wilson (1986). The results revealed that the PSAs examined appear to show the application of a range of linguistic devices that contribute to making their content humorous. Ambiguity, mostly generated by verbal and visual metaphors, vagueness and polysemy, appears to be the most common strategy for stimulating interest and engaging the viewer. It was observed that viewers must possess the ability to recover meaning through non-linguistic signifiers, such as body language, and through contextual cues. It was also established that similar linguistic devices tend to be used in the production of PSAs and advertisements to create humorous content, but to a different extent.
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