Analysing musical taste
Researchers from IIIT Hyderabad use music psychology to find how listening patterns reflect our current mental state, writes Sunory Dutt
It was while streaming Coldplay in an endless loop that I first discovered Kodaline. A suggested playlist that popped up based on my listening history exhorted me to consider Steve Garrigan's soulful voice. It was pretty spot on.
This is what data analytics in music does. Based on user behaviour, it is easy to tell what kind of people like to listen to what kind of music, at what kind of location, at what time, and so on. But personalising the entire music listening experience is just one part of the story.
Big Data hugely benefits the music industry by analysing listening patterns, preferences and musical genres to predict which song is likely to become a runaway hit. And now, going a step further from analysing metrics for business purposes is newer research that proposes mining such music data and finding insights into people's internal states.
Music and Big Data
"There are streaming services that store data from millions of people on their day-to-day musical listening habits; song-level data that tags sonic and emotion attributes for millions of songs; wearable devices (e.g. watches and earbuds) that capture physiological metrics including heart rate and galvanic skin response; mobile technologies that track a person's moment-to-moment activity, location, mood, and sociability; and survey instruments and digital footprints that capture personality and other biopsychosocial metrics in just under a minute," according to Music and Big Data: A New Frontier, a paper by David Greenberg and Peter Rentfrow.
They propose that a combination of all these technologies can usher in a new era for music psychology. Vinoo Alluri, who led research on Music Cognition at the Cognitive Science lab at International Institute of Information Technology, Hyderabad (IIITH), agreed.
Citing existing research which found that personality even predicts words in favourite songs (Qui, Chen, Ramsay et al), Alluri said, "There is sufficient evidence that supports the concept that music (rather musical choice) is indeed a mirror of the self and that it is an emotional, social, and cognitive expression of who we are."
"Also, our current states dictate the choice of music we would like to listen to (example: if we feel grumpy versus happy, we might pick different kinds of music to listen to). But now emerging research is demonstrating how music plays a role as a companion, a social surrogate of sorts, and serves a purpose other than just to relax as we think of music in India," Alluri added.
Healthy-unhealthy music scale
In 2015, to probe what music listening strategies reveal about our current mental state, Saarikallio et al conducted a study on Australian adolescents. They interviewed adolescents suffering from depression in a clinical setting and came up with a 13-point questionnaire that is widely known as Healthy Unhealthy Music Scale (HUMS).
Some of the examples of healthy items on the scale are 'Music helps me relax', 'I feel happier after playing or listening to music' and so on. Some of the unhealthy items are 'I hide in my music because nobody understands me, and it blocks people out', 'I like to listen to songs over and over, even though it makes me worse', and so on.
Researchers found that those who scored high on HUMS unhealthy items also scored high on the standard Kessler Psychological Distress Scale (K10). And in turn, they scored low on standard mental wellbeing diagnostic measures.
"On the distress scale, if you are above a certain threshold, you could be considered high risk; in the sense that you either already have some mental issues, or you are at a high risk of developing them," explained Alluri.
The researchers concluded that HUMS is not a direct measure of mental ill-being but an instrument to detect the risk of potential mental health problems in a non-intrusive way. And a high HUMS unhealthy score could be followed up with a screening measure for depression and suicidal ideation to conclusively find out.
An Indian Setting
To check the validity of HUMS in the Indian context, Alluri and her students first tested it out on young adults whose average age was 24. "There were no differences in the results. We found very similar patterns," said Alluri.
Then they tried it in a setting where 151 respondents working for an information technology company were sampled. Again highly similar results were exhibited. "It shows that no matter the age, if people are going through some distress, their musical engagement strategies are similar," she explained.
While the original Australian study sought to find a correlation between HUMS and the Kessler scale, Alluri and her students, Rajat Agarwal and Ravinder Singh, applied machine learning approaches to make accurate predictions of mental well-being from music associations. It was found that regardless of the dataset used, a universal pattern emerged allowing the researchers to predict mental well-being with 81 per cent accuracy.
"In India, people do not want to talk about mental illness due to the stigma associated with it. Some of the standard diagnostic tools to assess mental illness may have intrusive questions like, 'In the past two weeks, did you have thoughts that you would be better off dead, or of hurting yourself in some way?' and so on. It is not easy for people to acknowledge that. So we're using this as an indirect way to identify risk of depression," said Alluri.
The findings were published in a paper Mining Mental States Using Music Associations which was accepted recently for the Speech, Music, and Mind with Audio Satellite Workshop held at InterSpeech 2019 in Austria. It is labelled as the world's largest and most comprehensive conference on the science and technology of spoken language processing.
Current study with music streaming
On the lines of Greenberg and Rentfrow's paper on big data and music, researchers at IIITH too are trying to find answers to the bigger question of whether it is possible to unobtrusively monitor music listening preferences to identify and pre-empt red flags in mental health.
Towards this end, they have begun analysing timestamps of 600 willing participants who are last FM (a music streaming platform) users. In addition, they have also obtained their HUMS and personality scores.
"Last FM API allows us to mine music listening history which allow us to obtain information ranging from semantics (tags, lyrics) to information about the music (genre, artist, etc.) to the acoustic content of the song, to users' listening patterns (if they are listening to the same set of artists on a regular basis or sporadically)," said Alluri.
Now we are trying to understand what sort of patterns (either textual, acoustic, or habitual) exist in a more realistic music listening setting which may be indicative of poor mental health in addition to uncovering the potential modulatory role of personality," she added.
While conclusive results are awaited, it is a big step towards overcoming current taboos about mental health that exist in Indian society. DOWN TO EARTH
(The views expressed are strictly personal)
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