Cattell-Horn-Carroll
Theory of Cognitive Abilities
Motor
Controlled
Attention
Perception
Knowledge
Fluid
Reasoning
Gv
Gp
Psychomotor
Abilities
Gk
Gf
Ga
Gsm
Gh Go
Short-Term
Memory
Gps
Gt
Psychomotor
Speed
Speed
of Perception
Speed
Gq
Grw
Gc
Gkn
Gs
Glr
Attentional
Fluency
Learning Efficiency
& Retrieval Fluency
Fluid Intelligence (Gf)
Ability to reason logically &
figure things out without being taught
All Bloobahs like apples.
Some, but not all Bloobahs
are Jippits. Not all Jippits
are Bloobahs. Is it
possible that some
Jippits dislike apples?
Good is to better
as fast is to _____?
Which one is not
like the others:

g
2 3 6 11 18 __
If A + B = C
and A – B = D – C,
does D = 2A?
Match numbers
to letters
Crystallized Intelligence (Gc)
Ability to use language to reason & understand how the world works
Specialized
Knowledge
Language
Development
Math
Gq
Visual-Spatial Processing (Gv)
The ability to visualize solutions in the mind’s eye.
What is W going to
do when X spins?
Which lines are these
segments parallel to?
What is this?
Which is in
the figure above?
What does this look
like when assembled?
Same or different?
Distinguishing
speech sounds
THICK=/θ/ /ɪ/ /k/
Hearing sounds even
when there is background
noise or distortion
Is the sound the same
or different from before?
Auditory Processing (Ga)
What the brain does with sound to make it useful
Where is that
sound coming from?
Distinguishing melodies
Distinguishing rhythms
Memory
How much
information can be
repeated back
immediately?
How quickly and
efficiently is new
information
learned?
Short-Term
Memory (Gsm)
Long-Term
Memory (Glr)
How well can the
focus of attention be
directed to process
information?
How fluently is
information
retrieved from
storage?
<30 seconds
>30 seconds
Speed
Scanning
Speed
Speed of
perception
Processing
Speed (Gs)
Decision Speed &
Reaction Time (Gt)
How fluently can
the focus of attention
be moved from
item to item?
Speed of
reaction
Responding to many
items in succession
Responding to
a single item