BEWARE of overusing repetition

On the other hand, repetition of the key subject word can be overused - creating a text that does not flow well and is boring.

Compare Text A below to Text B. Text B is a copy of the model paragraph you have already seen.

Text A

Text B

Information is received from the environment by a range of sensory registers. Sensory registers reside in sensory memory. Sensory registers are modality specific: a register exists for each sensory modality such as vision, auditory and olfactory. Sensory registers have the ability to transform stimuli from the environment into physiological representations, which can be understood and retained in the memory system. Sensory registers therefore have a key role to play in human cognitive processing. Sensory registers also play a role in the larger system of memory.

Information is received from the environment by a range of sensory registers that reside in sensory memory. The sensory receptors are modality specific: a register exists for each sensory modality such as vision, auditory and olfactory. These have the ability to transform stimuli from the environment into physiological representations, which can be understood and retained in the memory system. They therefore have a key role to play in human cognitive processing. Sensory registers also play a role in the larger system of memory.

As you can see from this example, it is often unnecessary and usually clumsy to repeat subject words in a single sentence, or too many times in a paragraph. Instead we use referencing words - either synonyms, demonstratives or pronouns to give our writing variety, and to say more.