Mobile computing apparatus and method of reducing user workload in relation to operation of a mobile computing apparatus

A mobile computing apparatus (200) comprises a processing resource (202) arranged to support, when in use, an operational environment, the operational environment supporting receipt of textual content, a workload estimator (243) arranged to estimate a cognitive workload for a user, and a text-to-speech engine (242). The text-to-speech engine (242) is arranged to translate at least part of the received textual content to a signal reproducible as audible speech in accordance with a predetermined relationship between the amount of the textual content to be translated and a cognitive workload level in a range of cognitive workload levels, the range of cognitive workload levels comprising at least one cognitive workload level between end values.