"more complex responses" is correct and usable in written English.
You can use it when you need to refer to a response that is more involved or has more detail than a basic or simple response. For example, "The professor asked for more complex responses to the debate question than the students had originally offered."
Characterization also has become more subordinate to "the general purpose and design"; moreover, Dickens was presenting characters of greater complexity who provoke more complex responses in the reader (William Dorrit, for instance).
The president was wise to ask for patience as more complex responses are fashioned.
However, whilst interactions between different environmental cycles have been described for some of their prey, there is a lack of information about more complex responses in marine mammals.
The more complex responses of regional or local confined aquifers, which may be locally important to discerning groundwater climate interactions, are not considered.
Other fictional characters may invite or accommodate more complex responses, but most authors aim to engender some species of readerly empathy for their protagonists.
More complex responses, such as those exhibited by the immune and nervous systems, pose even greater challenges.
What they make of it elicits a much more complex response.
We additionally tested for and ruled out the presence of more complex response strategies by testing for patterns of autocorrelated responses (see Supplementary Methods and Fig. S1).
Instead Miliband called for a "more comprehensive and more complex response" to the riots based around "greater opportunities and values".
In particular, avoidance learning or protective motor reactions indicate a more complex response which implies central processing, rather than a simple nociceptive reflex.
Some 17,000km away in London, a new production of Donizetti's bloody tragedy provoked a far more complex response from its audience when it opened at the Royal Opera House in April.
