General Cognitive Ability (GCA)
Your ability to solve novel, ambiguous problems and to learn, rather than what you already know. Widely reported as the most heavily weighted of the four attributes. Bock framed GCA as how you think, not what you have memorized.
How you decompose an unfamiliar problem out loud: the structure of your thinking, the assumptions you surface, how you handle a curveball mid-answer. Interviewers and the hiring committee are reading for analytical reasoning and learning agility, not for recall of a known answer. A candidate who jumps straight to a tool without framing the problem reads as low GCA.
Lead with a hard or novel problem you solved, show the analytical decomposition, and quantify the outcome. Verb plus numeral, and make the reasoning visible, not just the tool.
Reduced fraud false-positives 34% by decomposing a misclassification problem into three feature-drift hypotheses, isolating the root cause to a stale geolocation signal, and shipping a recalibrated model in 5 weeks.
Tool-listing with no problem and no reasoning. A wall of frameworks and languages signals recall, not cognitive ability. The phrase strong problem-solver with no decomposition and no numeral is the most common GCA anti-pattern.
Strong problem-solver proficient in Python, SQL, TensorFlow, and a wide range of data-science frameworks and methodologies.
“Tell me about the most ambiguous problem you have worked on. How did you break it down when you did not yet know the answer?”