The paper by Talia Lavie and Noam Tractinsky explores the dimensions of perceived visual aesthetics in web design. Despite the importance of aesthetics in human-computer interaction (HCI), it has often been overlooked in research. The authors conducted four studies to develop a measurement instrument for perceived web site aesthetics. Using exploratory and confirmatory factor analyses, they identified two main dimensions: "classical aesthetics" and "expressive aesthetics." Classical aesthetics emphasizes orderly and clear design, while expressive aesthetics focuses on creativity and originality. Each dimension is measured by a five-item scale, and the reliability, factor structure, and validity tests indicate that these items effectively reflect the perceived aesthetic dimensions. The study highlights the importance of aesthetics in HCI and provides a tool for future research in this area.The paper by Talia Lavie and Noam Tractinsky explores the dimensions of perceived visual aesthetics in web design. Despite the importance of aesthetics in human-computer interaction (HCI), it has often been overlooked in research. The authors conducted four studies to develop a measurement instrument for perceived web site aesthetics. Using exploratory and confirmatory factor analyses, they identified two main dimensions: "classical aesthetics" and "expressive aesthetics." Classical aesthetics emphasizes orderly and clear design, while expressive aesthetics focuses on creativity and originality. Each dimension is measured by a five-item scale, and the reliability, factor structure, and validity tests indicate that these items effectively reflect the perceived aesthetic dimensions. The study highlights the importance of aesthetics in HCI and provides a tool for future research in this area.