Front End Development Research & Evidence-Based Practice 5

Question 1

What does 'Largest Contentful Paint' (LCP) measure and what is the 'good' threshold per Google?

Accepted Answer

Time for the largest visible content element to render; under 2.5 seconds

Answer

LCP measures when the largest content element (image, video, or text block) becomes visible; Google considers under 2.5 seconds 'good' for Core Web Vitals.

Question 2

In UX research, what distinguishes 'formative' research from 'summative' research?

Accepted Answer

Formative informs design decisions during development; summative evaluates a finished product against benchmarks

Answer

Formative research shapes the design process (e.g., early usability tests), while summative research measures the outcome of a completed design against defined success metrics.

Question 3

What is a 'heatmap' in front-end analytics research and what does it reveal?

Accepted Answer

A visual overlay showing aggregate user interaction patterns like clicks, taps, and scroll depth

Answer

Heatmaps aggregate thousands of user interactions into a color-coded visualization revealing which areas attract clicks, attention, or scroll engagement.

Question 4

What research principle does the 'F-pattern' eye-tracking finding inform for front-end layout design?

Accepted Answer

Users scan web pages in an F-shaped pattern, so critical content should be placed in the top and left areas

Answer

Nielsen Norman Group's eye-tracking research revealed users scan text content in an F-shaped pattern, making the top rows and left edge prime locations for important information.

Question 5

What is the 'jobs-to-be-done' (JTBD) framework used for in front-end product research?

Accepted Answer

Understanding the underlying goal or problem a user is trying to solve when they use a product

Answer

JTBD shifts focus from user demographics to the functional and emotional goals ('jobs') users are trying to accomplish, leading to more user-centered design decisions.

Front End Development Practice Test

Front End Development Practice Test

Front End Development Research & Evidence-Based Practice 5