This lecture was presented at the 6th psychometric summer school at the Moscow Higher School of Economics in August 2019. This talk describes and illustrates how latent curve analysis can be used to describe change over time. a data file and syntax file is provided. The files are taken from a repeated measures diary study in which students indicated their emotions 9 times either side of a mid-term test. The emotions are taken from Pekrun's Achievement Emotions Questionnaire. LCM can be used with both manifest variables and latent variables.