The article discusses the issue of the necessity of obtaining informed consent from an individual who is to be a participant in an experiment. Codes of ethics concerning the behaviour of a psychologist fundamentally do not permit conducting experiments without informing their participants in advance that they will be conducted. Meanwhile, the act of obtaining prior consent can have a significant impact on results. The article describes an experiment in the field of social influence psychology during which one group was (...) asked for their informed consent to participate in a study, while the second was simply presented with the main request. The results demonstrate the strong influence of awareness that a study is being conducted on the decisions taken in the course of the experiment. (shrink)

Considering the large number of adverts inundating the average consumer every day, the marketing industry is seeking methods to reach clients in a more subtle manner than traditional marketing messages. One such tool is product placement. The article addresses issues of effectiveness of product placement in comparison to a traditional commercial. The objective of the study was to check how participants would recall the content of persuasive messages in conditions of artificially-inducted cognitive load (in conditions of traditional advertisement and product (...) placement). Two studies were conducted – a pilot study intended to assess the usefulness of the selected stimuli, and the main experiment. The experiment devoted to this question was planned using an ANOVA scheme 2 (Type of advert: traditional vs. product placement) x 2 (neutral conditions vs. cognitive load). It turned out that the commercial was better retained in neutral conditions than in conditions of cognitive load. The traditional commercial was remembered better than product placement. From the perspective of the study’s ecological validity, of importance is also comparison of retention of brands viewed in a traditional commercial in conditions of cognitive load with retention of brands in conditions of product placement without load. These comparisons indicate the superiority of product placement – brands presented in this manner were more frequently recalled by viewers. (shrink)