第六讲 方差分析(下).ppt

5.6.3结果分析 不一致！ * 5.6.3结果分析 * 5.6.3结果分析 当Post hoc和Contracts的结果不一致时，以后者为准。 * 5.6.3结果分析 * 5.6.3结果分析 * 5.6.3结果分析 Mauchly’s test indicated that the assumption of sphericity had been violated for the main effects of drink, χ2(2) = 23.75, p .001, and imagery, χ2(2) = 7.42, p = .024. Therefore degrees of freedom were corrected using Greenhouse–Geisser estimates of sphericity (ε = .58 for the main effect of drink and .75 for the main effect of imagery). Report the results: * 5.6.3结果分析 Report the results: There was a significant main effect of the type of drink on ratings of the drink, F(1.15, 21.93) = 5.11, p = .011. Contrasts revealed that ratings of beer, F(1, 19) = 6.22, p = .022, and wine, F(1, 19) = 18.61, were significantly higher than water. There was also a significant main effect of the type of imagery on ratings of the drinks, F(1.50, 28.40) = 122.57. * 5.6.3结果分析 Contrasts revealed that ratings after positive imagery were significantly higher than after neutral imagery, F(1, 19) = 142.19. Conversely, ratings after negative imagery were significantly lower than after neutral imagery, F(1, 19) = 47.07. Report the results: * 5.6.3结果分析 There was a significant interaction effect between the type of drink and the type of imagery used, F(4, 76) = 17.16. This indicates that imagery had different effects on people’s ratings depending on which type of drink was used. To break down this interaction, contrasts were performed comparing all drink types to their baseline (water) and all imagery types to their baseline (neutral imagery). These revealed significant interactions when comparing negative imagery to neutral imagery both for beer compared to water, F(1, 19) = 6.75, p = .018, and wine compared to water, F(1,19) = 26.91. Report the results: * Looking at the interaction graph, these effects reflect that negative imagery (compared to neutral) lowered scores significantly more in water than it did for beer, and lowered scores significantly more for wine than it did for wat