Primary Mental Abilities refer to a set of distinct cognitive capabilities or aptitudes that are essential for various intellectual tasks. These abilities are generally considered to be separate and relatively independent dimensions of intellectual functioning.

Verbal Comprehension is the ability to understand and interpret verbal information, including words, meanings, and relationships between concepts. It involves language comprehension, vocabulary knowledge, and verbal reasoning skills.

Inductive Reasoning refers to the ability to identify patterns, make generalizations, and draw conclusions based on specific instances or examples. It involves the recognition and application of logical rules and the ability to think critically.

Number Facility is the aptitude for working with numbers and mathematical operations. It encompasses the understanding and manipulation of numerical information, numerical reasoning abilities, and mathematical problem-solving skills.

Fluency of Ideas refers to the ability to generate a variety of alternative solutions, ideas, or concepts quickly and flexibly. It involves creative thinking, brainstorming, and the generation of multiple options within a specific context or problem domain.

Memory is the capacity to encode, store, and retrieve information over time. It involves both short-term and long-term memory processes, including the ability to remember and recognize facts, events, and experiences.

Perceptual Speed is the quickness and efficiency with which visual or auditory information can be processed. It includes tasks such as rapidly identifying and matching visual stimuli or distinguishing between different sounds.

Spatial Visualization is the ability to mentally manipulate and comprehend spatial relationships and configurations. It involves accurate perception and visualization of objects, shapes, and their orientations in three-dimensional spaces.

Reasoning is the capacity to think logically, analyze complex information, and derive valid conclusions. It encompasses deductive reasoning, problem-solving, and the ability to apply logical rules to arrive at solutions.