If your friend were to read your mind, surely they would be able to 'hear' their own thoughts reiterated back – because those things are what linger at the front of your psyche. Various points of interest could lead to this indeed being true. Of course, one has to start with the assumption that reading minds in a possible phenomenon – let's say you and your friend exist in a universe where mind reading may not be commonplace, but it exists as a skill, such as that of being a skilled musician.
The next assumption one must make to reach the conclusion is that mind-reading is not a separate, external process, such as looking into the foggy haze of a glass ball, but is so much more of a complex that it involves the reader ‘travelling’. Now, this could be supposed as travel of the soul, as in a kind of astral travel, which it is more likely to be than any supposed physical movement; but, say, the body is in a state of immobility, and, using a dualistic theory, it is not the soul that moves, but a part of your friend’s consciousness that is ‘thrown’ into your mind.
This plot-device has been portrayed a fair number of times, with the protagonist finding themselves in the world of the mind, their own body a psycho-physical replica whole to stand and observe in the same way that navigating the real world is done. I disagree with this portrait.
Surely, if one is sending a slice of consciousness (assuming, here, that consciousness is, whilst not divided into parts as we know the physical splits, able to sustain the body of your friend, but, at the same time, take in the ‘mental region’ it has been transferred to), one will only experience the images and views of the mind? And this, as abstract as it is, is unlikely to hold a solid world as much as be stray images and sounds.
The mind is a jumble, certainly. Hence, the likelihood for mind-reading to go awry. Keeping these assumptions as they are, we can begin to see how someone reading your mind is more likely to find their own mental processes and consciousness in lieu of your own.
Of course, this relies on indifferentiation. If the searching consciousness can tell itself apart from your own, mistakes would be far more arbitrary. Instead, I propose that, even through the regular order of the Working Memory Model, an abstract consciousness would come across its own perpetual state of thought. This is because a ‘projected’ consciousness still is exactly that – a consciousness with all its present thoughts and inquires. You will possess your own thoughts as they are being searched; one could easily suppose that these may be heard first by the invading consciousness.
However, the chance remains that the invading consciousness dominates your own ‘mind’ and consciousness, as it may be. They are likely to have to wade through their own thoughts, for instance, “what am I looking for?”, before they reach yours. After all, an ‘invading’ mind is probably dominant and controlling of both consciousnesses.
Of course, this is purely hypothetical. In prose, one ought to discover mind-reading with an emphasis on success. Going by true science, however, it is unlikely that mind-reading, if possible, would ever produce comparable results; the mind is too complicated an abstract for this to be plausible.