The Center for Epidemiological Studies-Depression (CES-D), originally published by Radloff in 1977, is a 20-item measure that asks caregivers to rate
how often over the past week they experienced symptoms associated with depression, such as restless sleep, poor appetite, and feeling lonely. Response
options range from 0 to 3 for each item (0 = Rarely or None of the Time, 1 = Some or Little of the Time, 2 = Moderately or Much of the time, 3 = Most or
Almost All the Time). Scores range from 0 to 60, with high scores indicating greater depressive symptoms.
The CES-D also provides cutoff scores (e.g., 16 or greater) that aid in identifying individuals at risk for clinical depression, with good sensitivity and specificity and high internal consistency.
Think about the last time you gave a big speech, or when your team was on the verge of winning a big game. Your palms were sweaty and your heart was
pounding – the same physiological reactions that occurred when you were last at a scary movie or went camping and heard a weird noise outside your bed.
That’s the mark of high-arousal emotions.
Affect arousal is the state of being activated, either physiologically or psychologically, and is one dimension of our affective response to emotional stimuli. Psychological characteristics of arousal include feelings of vigor, energy, and tension. Physiological symptoms of arousal include increased heart rate and blood pressure, among other changes.
Psychologically, the state of high arousal is associated with the subjective experience of feelings including high energy and tension. Depression is posited to involve a low arousal. In our approach, we aim at predicting the value of arousal that'll be generated in the individual watching it. A video that leads to low arousal generation will lead to feelings like depression, fatigue and sadness.
Valence, as used in psychology, means the intrinsic attractiveness/"good"-ness (positive valence) or averseness/"bad"-ness (negative valence) of an
event, object, or situation. For example, emotions popularly referred to as "negative", such as anger and fear, have negative valence whereas joy has positive valence.
Videos that generate low valence values along with a state of low arousal would lead to feelings like depression.(i.e., depressed, washed-out, passive, low in energy, and sad;)
Valence ranges from highly negative to highly positive, and arousal ranges from calming/soothing to exciting/agitating.
Problem explaination and solution proposal. The path to be followed is explained and pipleines etc. are discussed.
This post explains the model trained for classification of videos as depressive. It also discusses the data collection methodology and various other models that we experimented with.
In this post, the CES-D score calculation along with the analysis of comments is discussed. We talk about our evaluation methodology and results produced by the classifier in a real-life setting.
Calculation of Arousal Valence values from a video is discussed here. We talk about our proposed approach for prediction of arousal valence, the dataset used and the results form various experiments performed.