This question is if the von Neumann–Wigner interpretation, aka "consciousness cause collapse" (see e.g. John von Neumann's 1932 book The Mathematical Foundations of Quantum Mechanics) is compatible with the quantum Zeno effect (see Sudarshan, E. C. G.; Misra, B. (1977) "The Zeno's paradox in quantum theory", Journal of Mathematical Physics 18 (4): 756–763) respectively its empirical observation (such as by Wineland 1989 or by Raizen 2002). Or if the Quantum Zeno effect falsies or created the possibility to empirically verify the von Neumann-Wigner interpretation.
Assume measuring the state of a system every second causes a zeno effect and measuring every three seconds causes an anti-zeno effect.
Now let's assume the state is measured every second and recorded. A proponent of the "consciousness causes collapse" interpretation would argue that the wave function only collapses when a conscious observer actually looks at the measurement results.
But what if the conscious observer first looks at only every third result and decides only afterwards on whether to look at the other results too. Will she observe the zeno effect depending on her future decision?
Wouldn't such an experiment show that either (1) the consciousness of the observer has no impact and there is a zeno effect even if two out of three measurement results are destroyed before a conscious observer looks at them or that (2) the observer has no free will and whenever she observes a zeno effect looking at every third measurement she can't help but looking at the other results too, and conversely if the first set of results she looks at shows an anti-zeno effect she has an irresistible urge to destroy the other results?
Well the first option looks more plausible to me, but it seems like something that could be experimentally tested.