This research investigates the placebo effects of price and brand on consumer judgment and focuses on how two psychological moderators, deliberation thinking and self-confidence, influence the placebo-like effects. Two experiments were conducted. The results show that although different prices and brands on the same product would not influence consumers’ taste evaluation, they would affect participants’ grades in the memory test. That means there is a placebo effect on price/brand cues. The results also indicate that the placebo effect of price is more influenced by the discounted price than the regular price when people have low deliberation thinking. Furthermore, the findings show that the effects of brand and self-confidence create an interaction effect. Self-confidence moderates the placebo effect of brand on consumers’ judgment. Theoretical and managerial implications of the findings are provided.
Traditional models of economics presume that consumer utility for goods/services is determined by how much utility they will receive from a product, and then consumer accepts the transaction if the selling price is below his/her baseline price. The demand for a product is independent of the actual utility given by the product. Past research has shown that consumers sometimes use price information as a proxy for quality. In other words, price information may be used as a heuristic by which people infer the relative merit of a product or service [
A placebo has been defined by S. Stewart-Williams and J. Podd in medical literature as “a substance or procedure that has no inherent power to produce an effect that is sought or expected” [
In 2005, B. Shiv, Z. Carmon and D. Ariely (hereinafter SCA) [
The purpose of this research is to extend SCA’s findings and to investigate how two individual-difference factors, deliberation thinking and self-confidence, moderate the placebo-like effects of price and brand on consumers’ judgment.
Placebo effects have long played a key role in medicine. For thousands of years many medical treatments were without specific objective effect and thus relied exclusively on placebo responses. The placebo effect is a topic of interest to psychologists and health practitioners in a wide variety of areas, and the question of the mechanisms underlying this effect is gaining increasing attention. Two mechanisms are believed to account for placebo effects: expectancy theory and classical conditioning. According to the expectancy theory, placebo effects arise because beliefs about a substance/procedure serving as a placebo activate expectations that a particular effect will occur, which then affect the subsequent effectiveness of the substance/procedure. The classical conditioning view considers consuming substances with known therapeutic effects to be conditioning trials [
In marketing, a placebo of this form might be a brand that claims to have certain properties that it does not actually possess and, through such claims, changes the consumer’s behavior. In their work, SCA demonstrate that expectations play an important role in marketing placebo effects. Indeed, support for the efficacy of expectations goes back more than 1700 years: “He cures most in who most are confident,” by M. P. Jensen and P. Karoly [
Since H. J. Leavitt [
On the other hand, price is not the only important cue. The meta-analysis suggests that, for consumer products, the relationship between price and perceived quality and between brand name and perceived quality are positive and statistically significant [
Wilson and his colleagues [
Consumer self-confidence is defined as the extent to which an individual feels capable and assured with respect to his or her marketplace decisions and behaviors. According to P. K. Adelman [
J. E. Olsen, K. J. Thompson and T. K. Clarke [
In this article, the authors extend and support SCA’s findings by documenting for the first time a sugar pill placebo effects (price and brand) for everyday consumer products. Two studies were conducted in this research. Suggest writing this next sentence as two sentences. In study 1, the authors propose that when participants eat the same chocolates priced differently, a placebo-like product (regular price vs discount price), will impact their short-term memory performance. However the levels of elaboration will moderate the placebo effect of price. In study 2, the authors find that the placebo effect manifests only for high confidence consumers who desire the arousing effects of a product. Expectations and the meaning of contextual effects drive the placebo response.
Four hypotheses were verified.
H1: People will perform greater in the regular price condition than in the discount price condition.
H2: People with high elaboration will perform greater than people with low elaboration.
H3a: People with low elaboration will perform a higher memory task in the regular price condition than in the discount price condition.
H3b: People with high elaboration, there is no differrence of performance in memory task between regular price condition and the discount price condition.
H4a: People with high self-confidence will perform a higher memory task in the high brand equity than in the middle brand equity and the low brand equity condition.
H4b: People with high self-confidence will perform a higher memory task in the low brand equity than in the middle brand equity and the high brand equity condition.
To examine both a difference in price as well as a difference in brand, on the efficacy of a placebo analgesic, two studies were conducted.
One hundred and twenty undergraduate students in a computer lab were recruited for the experiment in exchange for a course credit. Participants were assigned to one of four conditions in a 2 (price: regular price vs discount price) × 2 (elaboration: low vs high) betweensubjects design. The experimental stimulus was chocolate.
Participants were led to a private cubicle that contained a personal computer and a prepared piece of chocolate. They were told that chocolate can improve people’s short memory before the experiment. Participants were randomly assigned to one of two conditions: In the regular price condition, the price of a box of chocolate was tagged NT$10001, Truffaut’s. In the discount price condition, the price of a box of chocolate was tagged NT$300 (70% off of NT$1000). The price was used as a manipulated variable. A regular price, NT$1000 was tagged as a regular price, whereas the discount price condition provided 70% off discount (i.e., NT$300). The measurement of elaboration process was asked for participants to write down the product knowledge of chocolate which they ate as a moderating variable in this experiment. An online memory test was conducted after participants ate the same chocolate tagged by different prices.
Eight invalid samples were excluded because of wrong answer for the price. Elaboration was divided into two groups (median score). The means values for the performance of short memory task were shown in
More importantly, there is a marginal interaction effect of price and elaboration (F(1, 109) = 2.82, p < 0.1). Participants with low elaboration will perform for a higher memory performance in the regular price condition (M = 16025.71, SD = 4743.07) than in the discount price condition (M = 11966.67, SD = 4552.51). People with high elaboration, there is no difference of memory perfor-
mance between regular price condition (M = 17161.90, SD = 5530.05) and the discount price condition (M = 16268.29, SD = 4621.69). H3a and H3b were confirmed.
Brand names are cultural information and in essence a fundamental part of the ritual surrounding an object. Brands touch upon quality signaling, issues of personal identity and choice, nostalgia, and group affiliation. The purpose of experiment 2 was to test H4a and H4b whether self-confidence would have further impact on the placebo effect of brand.
One hundred and eighty-eight students were recruited in the experiment in exchange for a lottery coupon. Participants were assigned to one of the experimental conditions in a 2 (brand equity: high vs medium vs low) × 2 (self-condition: high vs low) between-subjects design. The experimental product was three kinds of brands.
The procedure of experiment 2 was the same as experiment 1. Three brands, Truffaut’s from France, 77 from Taiwan, and Meiji from Japan, were tagged as a placebolike brand. After tasting the manipulated chocolate, participants were asked to fill out the self-confidence scale by Bearden et al. [
The manipulation check of brands showed a significant difference among conditions (MTruffettes = 17413.56, M77 = 14544.62, MMeiji = 16742.19; F(2, 182) = 9.14, p < 0.01). Post hoc tests showed that all means were different from each other at the 0.01 level. The difference reflected that the France brand Truffaut’s was performed as having a higher brand equality than the 77 and the Meiji conditions.
An ANOVA with performance of memory task as dependent variable, and brand (Truffaut’s vs 77 vs Meiji) and self-confidence (high vs low) as independent variables revealed a significant main effect of brand (F(2, 182) = 9.14, p < 0.01), with the high brand equity leading to higher memory performance than the medium and low brand equity conditions (MTruffettest = 17413.56, M77 = 14544.62, MMeiji = 16742.19). The performance of memory task at the three different levels of brands indicated that the higher the brand equity, the greater the performance of memory task. The result was robust and demonstrated the experimental data are consistent with SCA (2005) and Irmak et al. (2005).
This effect is also qualified by a marginally significant interaction between brand and self-confidence on performance of memory task (F(2, 182) = 0.24 p < 0.1). The high and medium levels of brand equity increase the performance of memory task when self-confidence was high (MTruffettes = 18440.00, MMeiji = 17291.43) compared to when self-confidence was low (MTruffettes = 16658.82, MMeiji = 16079.31). But the effect of self-confidence decreased the performance of memory task when the selfconfidence was high (see
The results of this paper are consisting with SCA’s study. The findings provide compelling evidence that marketing activities (e.g., price and brand) can lead to substantial placebo effects. As in SCA’s research, the placebo effect that we observed led to changes in the participants’ experience with the efficacy of the product. The placebo chocolate was capable of raising short memory, increaseing physical reflexes, enhancing mental alertness, and raising the self-reported arousal level for the participants. Notably, these placebo effects were only observed for highly motivated participants.
When participants reported a high degree of elaboration for the increased short memory task, the results showed that the placebo chocolate led to the same levels of performance. However, when participants had low levels of elaboration, consumption of the chocolate led to the same effects as a discount price. In addition to the important role that expectations plays in marketing placebo effects, these data suggest that motivation also plays an important role. It is possible in some situations that these two constructs interact in interesting ways. For example, in some situations, highly motivated people might change their expectations, thus leading to a placebo
effect. However, our data do not support such a mediating role in the scenario we investigated. Our investigation suggests that sometimes consumers do not necessarily have to expect a product to work, they just have to want it to work [4,6].
Although the medical literature reveals that the focus of investigations is on positive or beneficial effects of placebos, SCA clearly demonstrate that there can be substantial negative effects of placebos in marketing contexts. The physiological placebo effects we observe in this study also suggest that caution should be taken when making claims about products that seem harmless. An interesting aspect of SCA’s work is the demonstration that marketing placebo effects can occur largely noncomsciously. Whereas the motivation that drove the placebo effect we observed in our study was conscious, it seems highly likely that the mechanism through which it operated may also have been nonconscious. Further research in this domain should prove extremely interesting both to marketers and to public policy makers.
This study was supported by a grant from the National Science Council (NSC 99-2410-H-415-022) for the first author. The authors gratefully acknowledge the reviewers in the 2012 Asia-Pacific Association for Consumer Research Conference for their insightful comments on earlier drafts of this paper.