The study investigates the relationship between novelty, complexity, and hedonic value (pleasingness and interestingness) in visual stimuli. Two experiments showed that both pleasingness and interestingness increase with novelty, contradicting findings that suggest an inverse relationship between novelty and verbal preference. Further experiments examined how variables like homogeneity and complexity affect these ratings. Homogeneous sequences led to greater decreases in pleasantness compared to heterogeneous ones, while complex stimuli showed less decline or even increased pleasantness. These findings support hypotheses about hedonic value mechanisms. The study also explores how novelty interacts with complexity in determining the pleasingness of visual patterns. Previous experiments on novelty and complexity revealed that complexity can influence preference and interest. The current study extends this by examining how novelty and complexity interact. The results suggest that both pleasingness and interestingness generally increase with novelty, though complex stimuli may show a faster decline in interest. In Experiment III, the study used both simple and complex stimuli to test the effects of familiarity on hedonic value. The results showed that complex stimuli tended to have higher hedonic values as they became less novel, while simple stimuli showed a decline. The study also found that representational stimuli had steeper declines in hedonic value compared to nonrepresentational ones. Experiment IV examined the effect of attention instructions on ratings. The results showed no significant differences between groups with and without attention instructions, suggesting that the procedure did not significantly affect ratings. Experiment V confirmed the predictions from the Wundt curve interpretation, showing that complex stimuli reached a peak in hedonic value and then declined, while simple stimuli showed a continuous decline. The study concludes that hedonic value is influenced by the interaction of two factors: a tedium factor that may dominate with simple stimuli and a positive-habituation factor that may dominate with complex stimuli. The findings support the idea that hedonic value is influenced by arousal levels, with moderate arousal leading to positive hedonic value and higher arousal leading to negative hedonic value. The study highlights the importance of novelty and complexity in determining the hedonic value of visual stimuli.The study investigates the relationship between novelty, complexity, and hedonic value (pleasingness and interestingness) in visual stimuli. Two experiments showed that both pleasingness and interestingness increase with novelty, contradicting findings that suggest an inverse relationship between novelty and verbal preference. Further experiments examined how variables like homogeneity and complexity affect these ratings. Homogeneous sequences led to greater decreases in pleasantness compared to heterogeneous ones, while complex stimuli showed less decline or even increased pleasantness. These findings support hypotheses about hedonic value mechanisms. The study also explores how novelty interacts with complexity in determining the pleasingness of visual patterns. Previous experiments on novelty and complexity revealed that complexity can influence preference and interest. The current study extends this by examining how novelty and complexity interact. The results suggest that both pleasingness and interestingness generally increase with novelty, though complex stimuli may show a faster decline in interest. In Experiment III, the study used both simple and complex stimuli to test the effects of familiarity on hedonic value. The results showed that complex stimuli tended to have higher hedonic values as they became less novel, while simple stimuli showed a decline. The study also found that representational stimuli had steeper declines in hedonic value compared to nonrepresentational ones. Experiment IV examined the effect of attention instructions on ratings. The results showed no significant differences between groups with and without attention instructions, suggesting that the procedure did not significantly affect ratings. Experiment V confirmed the predictions from the Wundt curve interpretation, showing that complex stimuli reached a peak in hedonic value and then declined, while simple stimuli showed a continuous decline. The study concludes that hedonic value is influenced by the interaction of two factors: a tedium factor that may dominate with simple stimuli and a positive-habituation factor that may dominate with complex stimuli. The findings support the idea that hedonic value is influenced by arousal levels, with moderate arousal leading to positive hedonic value and higher arousal leading to negative hedonic value. The study highlights the importance of novelty and complexity in determining the hedonic value of visual stimuli.