Why audiences click, scroll, stay, and leave. The psychology behind engagement, and the designs that exploit it.
Unit B: How do they behave?
The previous four lectures explained who the audience is. Today we ask why it does what it does, and who is designing those behaviours.
Engagement is rarely accidental. It is produced by well-understood psychological mechanisms, some of which are harnessed ethically and some that are not.
By the end of today
What you will walk out knowing
01
Apply uses and gratifications
Explain why audiences choose specific media and genres using the U&G framework, and name its five core assumptions.
Reveal
02
Explain parasocial bonds
Describe how audiences form one-sided relationships with media figures, why these feel real, and how platforms engineer and exploit them.
Reveal
03
Identify habit and variable reward
Map the habit loop and explain how variable reward schedules keep audiences returning, using examples from games, OTT, and social media.
Reveal
04
Spot dark patterns
Distinguish ethical engagement design from manipulative design, and evaluate where the line falls.
Reveal
Katz, Blumler & Gurevitch · 1974
Uses and gratifications
People do not just passively receive media. They actively choose it to fulfil specific needs. The key question shifts: not "what does media do to audiences?" but what do audiences do with media?
Audiences use media with purpose. They have needs and choose media they expect to satisfy those needs.
Media must satisfy social or psychological needs. Information, entertainment, escape, social connection, and identity are the classic gratification categories.
Audiences are rational actors. They select among competing media options based on expected gratification.
Media compete with each other. A specific medium or genre can only fulfil some needs; audiences move between options.
Gratifications sustain habits. If media stops delivering the gratification, the behaviour stops.
In Bangladesh: Bongo satisfies nostalgia and language-specific entertainment needs that global platforms cannot. That is a gratification advantage no algorithm can easily copy.
Horton & Wohl · 1956
Parasocial relationships
Audiences form one-sided relationships with media figures. The presenter, the streamer, the creator speaks to you directly. You feel you know them. They have no idea you exist.
It feels real. Brain response to a parasocial companion activates similar regions to real-world social bonds. The emotional stakes are genuine even though the relationship is one-directional.
Presence intensifies it. Reality TV and live streaming exploit "presence": the illusion that you are watching a non-mediated, real encounter.
Trust transfers. Parasocial trust is why influencer marketing works. You trust the recommendation of someone you feel you know, even if you have never met them.
Loss is genuinely painful. When a parasocial figure dies, retires, or betrays their audience's values, the grief and anger are proportional to the depth of the relationship built.
A Bangladeshi YouTube creator with 500,000 subscribers has hundreds of thousands of people who feel they know them personally. That is the asset being monetised.
Habit and variable reward
The habit loop and variable reward
01
The cue
A notification, a time of day, a moment of boredom. Platforms design cues that fire at psychologically vulnerable moments: the first thing you reach for in the morning, the gap before sleep.
Reveal
02
The routine
The behaviour itself: opening the app, scrolling the feed, watching the next episode. The smoother and lower-friction the routine, the more likely the habit forms.
Reveal
03
The reward
The payoff: a funny video, a friend's post, a like on your own content. Crucially, the reward is variable. Skinner showed that unpredictable rewards build stronger habits than fixed ones.
Reveal
04
Variable reward in practice
You do not know if the next scroll will be dull or delightful. That uncertainty is the hook. Slot machines use the same mechanism. Natasha Schull called this the "machine zone."
Reveal
05
Boredom as driver
Paasonen shows boredom is not the opposite of engagement: it is often the engine. The low-engagement scroll looking for something interesting is itself a habit that platforms have colonised.
Reveal
06
Habit vs dark pattern
A habit the user consciously chose and can exit is not inherently a dark pattern. A habit engineered to be difficult to break, invisible to the user, or addictive by design crosses the line.
Reveal
Interactive story
Interactive story
Follow Rumi through an evening scroll
Read each moment of Rumi's scroll. Click "Next" to advance. A hook label will appear when a pattern fires.
Two more drivers
FOMO and social proof
01
Fear of missing out (FOMO)
FOMO is anxiety about being excluded from events, conversations, and experiences others are having. Social platforms are engineered around it: the unread notification count, the story that expires in 24 hours, the trending topic that everyone else seems to know about.
Reveal
02
Social proof
Humans use others' behaviour as a signal of correct action. Visible like counts, share numbers, trending labels, and "X others are watching this" cues all trigger social proof. Platforms amplify these signals to drive the behaviour they want to measure.
Reveal
03
How they combine
FOMO and social proof reinforce each other: the trending topic triggers FOMO, the view count provides social proof, the combination makes engagement feel obligatory rather than chosen.
Reveal
04
The gratification overlap
Uses and gratifications theory frames these as genuine needs: social integration, surveillance, and identity affirmation. Platforms did not invent these needs. They learned to activate them more efficiently and at greater scale than any prior medium.
Reveal
Hotspot
Hotspot
Spot the dark pattern
Click each feature of this mock app screen. Is it ethical engagement design or a dark pattern?
Autoplay countdown
The next episode starts in 5 seconds unless you actively cancel. Requires deliberate effort to stop. Designed to continue viewing beyond conscious intent.
Personalised recommendations
Showing content matched to your past viewing. Based on declared or inferred preferences. Raises relevance for genuinely interested users.
Hidden cancel button
The unsubscribe option is buried inside three nested menus, uses small grey text, and requires re-confirmation. Makes stopping harder than starting.
Unread notification badge
A red badge showing "99+" alerts that are mostly algorithmic content pushes, not personal messages. Triggers FOMO and compulsive checking.
Content warnings
Upfront labels on content that may be disturbing or inappropriate. Gives the user genuine choice about what to engage with.
Infinite scroll
No natural stopping point in the feed. No page end, no "you're up to date" message. Removes the environmental cue that would naturally end a session.
Drawing the line
Ethical engagement vs exploitation
Ethical design. Uses psychological knowledge to help users achieve their own purposes: find content they genuinely enjoy, build skills, stay informed, connect with people they care about.
Dark patterns. Use psychological knowledge to keep users in a platform or behaviour longer than they would consciously choose, to extract more data, more attention, or more spending.
The test. Would the user endorse this design if they understood it fully? If the answer is no, that is the dividing line.
The structural problem. Engagement metrics are what platforms optimise. Maximising engagement maximises revenue. Dark patterns are a feature of the business model, not a bug in the code.
Mobile games in Bangladesh: Candy Crush-style games use variable rewards ethically for casual entertainment. Pay-to-win mechanics targeting spending propensity data to extract real money cross the line.
Five sectors, same psychology
Engagement mechanics across the board
01
News
Chartbeat shows editors a live dashboard of clicks and dwell time. The gratification of being informed competes with the dark pattern of outrage-as-engagement. Headline A/B testing exploits curiosity gaps.
Reveal
02
OTT
Autoplay, personalised rows, and completion-rate optimisation exploit habit loops. Netflix does not tell you what episode you left on: the app opens at the right moment as a cue.
Reveal
03
Games
Battle passes exploit loss aversion. Daily login rewards are variable reward schedules. Limited-time events trigger FOMO at scale.
Reveal
04
Music
Spotify's Discover Weekly uses variable reward: you never know if this week's playlist will be revelatory or flat. That uncertainty is why it has a weekly open rate far higher than most marketing emails.
Reveal
05
Creators
The notification bell is a deliberate FOMO trigger. Super-chat and membership systems exploit parasocial loyalty. Comment-heart replies from creators are a variable-reward schedule.
Reveal
06
Platforms
All of the above. Plus: the invisible feed algorithm as the slot machine lever. Every scroll is a pull with an unpredictable payoff.
Reveal
Knowledge check
Knowledge check
A mobile game gives players a reward every time they log in, but the reward is randomly either a common item or a rare one. Which psychological mechanism does this exploit?
B. Variable reward schedules, identified by Skinner and applied directly by game designers, produce more persistent behaviour than fixed rewards precisely because the uncertainty keeps the loop active.
Uses and gratifications theory frames audiences as active choosers who select media to fulfil specific needs, not as passive receivers of whatever is transmitted.True. This is the core reversal U&G makes: instead of asking what media does to people, it asks what people do with media.
A parasocial relationship is mutual: the media figure and the audience member each know and respond to the other personally.False. By definition, parasocial relationships are one-sided. The audience member feels they know the figure personally; the figure has no knowledge of the individual audience member.
Your turn · 15–20 min
Worksheet activity
Hook Teardown
Step 1
Pick one app
Choose one app you opened at least three times yesterday. List four specific design features or moments you noticed: a notification, an autoplay, a recommendation, a reward.
Step 2
Label the mechanism
For each feature, identify the psychological mechanism it activates: U&G gratification, habit loop component, variable reward, FOMO, social proof, or parasocial bond.
Step 3
Ethical or dark?
Rate each feature: ethical design, borderline, or dark pattern. Apply the test: would you endorse this design if you fully understood it? Then suggest one humane redesign for the darkest feature.
Today in five lines
Recap
01U&G: audiences choose media purposefully to fulfil specific social and psychological needs.
02Parasocial relationships feel real, transfer trust to platforms and creators, and can cause genuine grief when broken.
03Habit loops and variable reward schedules are the engine of compulsive return behaviour across all sectors.
04FOMO and social proof are not bugs but deliberate architectural features of platform design.
05The line between ethical engagement and dark pattern is whether the design serves the user's own goals or subverts them.
Next class: Participation and Produsage. We move from how audiences are engaged to what happens when they start producing.
Digital Audience · Lecture 05
You are being designed.
This week’s reading
Reading list
NoteNone of the course texts cover parasocial bonds, habit loops, or dark patterns directly — this lecture runs on original synthesis.
SupplementaryJeffres, Audience Genre Expectations in the Age of Digital Media — Ch. 3, Uses and Gratifications Theory section