5.1 Beneficial and Harmful Effects

What you need to know

• A computing innovation includes a program as an integral part of its function — a physical device, a system, or an app. Its effect is the impact it has on society, economy, or culture.
• Effects can be beneficial or harmful, and the same innovation is often both — for different people or in different contexts.
• Intended effects are what the innovation was designed to do. Unintended effects are consequences nobody planned — and these can be positive or negative.
• Innovations designed for one purpose get used in ways their creators never imagined, and sometimes those uses become the main thing (the web was built for sharing physics papers).
• Effects at scale differ from effects on one person: a feature that's harmless for one user can reshape behavior when a billion people have it.
• Responsible developers consider potential harmful effects during development, not after. It's impossible to predict everything, which is why monitoring effects after release matters.
• Advances in computing have generated new careers and ended others, changed how people communicate and access information, and altered privacy expectations.

Worked example

Ride-sharing apps. Intended: easier, cheaper rides. Beneficial: more transportation options, flexible income for drivers. Harmful: reduced income for taxi drivers, congestion, precarious work with no benefits. Unintended: changes in city parking demand and public transit ridership. A strong exam answer names at least one effect on each side and notes that the harms fall on different groups than the benefits.

Going deeper

The nuance, edge cases, and connections that turn a 3 into a 5.

• A computing innovation, per the CED, "includes a program as an integral part of its function." That covers apps, self-driving cars, medical devices, recommendation systems. A hammer isn't one; a smart thermostat is.
• Effects are the innovation's impact on society, economy, or culture. The exam wants you to categorize effects along two axes: beneficial vs. harmful and intended vs. unintended. All four combinations exist. An unintended benefit is just as real as an unintended harm.
• The classic examples: the internet was designed for research communication; its effect on commerce, entertainment, and politics was unintended. Social media was designed to connect friends; its effect on attention, mental health, and misinformation was unintended and, for many, harmful.
• Scale changes effects. A feature used by 100 people has small effects. The same feature used by a billion people changes how society works. Developers often can't foresee scale effects because they build for the small case.
• The CED says people create innovations "for a purpose" but they can be used "in ways that are unintended" — and it's not only bad actors. Ordinary users find uses developers didn't imagine. Sometimes those become the main use (SMS was an afterthought; it became the killer feature).
• Responsible development means thinking about potential harmful effects during design, not only after harm occurs. It's impossible to predict everything, so responsible developers also monitor effects after release and respond to them.
• Computing has changed work: new jobs (app developer, data scientist) exist that didn't; some jobs (travel agent, switchboard operator) have largely disappeared. The exam treats this as a mixed effect — beneficial for some, harmful for others, both true.
• Computing has changed access to information (nearly unlimited, but also unfiltered), communication (instant, global, but also surveilled), and privacy expectations (what was private is now routinely collected). Every one of these is a two-sided effect.
• The Explore Task (a former exam component whose vocabulary persists in the CED) asked students to analyze a computing innovation's purpose, function, effects, and data use. Questions on this topic often mirror that structure.

Mistakes that cost points

• Picking the one-sided option. "This innovation is only beneficial" or "has no harmful effects" is essentially never correct. The CED's whole point is that effects are mixed.
• Confusing unintended with harmful. Unintended effects can be good. The two axes are independent.
• Assuming the developer is responsible for every use. The CED presents this as a tension, not a settled rule. Options that assign all responsibility to one party are usually distractors.
• Ignoring who is affected. A strong answer says which group benefits and which group is harmed. "Society benefits" is too vague when the harm falls on a specific group.

Practice questions

Written in the style of the real exam. Try each one before revealing the answer.