Question

in the digital age, computers and cell phones offer an endless stream of stimuli. due to constant email alerts and text messages, people are losing the ability to focus on a single task. an experimental eyeglass system called narbis hopes to change that. the eyeglasses come with a headset that uses sensors to measure the wearers brain activity. when the wearer loses concentration, the glasses darken, and thus the wearer cant see. the brain naturally attempts to clear the glasses, and in the process, learns to focus. narbis is based on a method called neurofeedback, a type of brain training. in neurofeedback, your brain waves are shown to you in real time so you can learn to focus them in desirable ways.
match causes with their effects.
the wearer cant see. you can learn to focus.
concentration is difficult.
cause
technology is a distraction.
the glasses darken.
neurofeedback reveals your brain waves.
effect

Explanation:

• Technology is a distraction: In the text, it is stated that due to constant email alerts and text messages (which are part of technology), people are losing the ability to focus. So, the effect of "Technology is a distraction" is "Concentration is difficult".
• The glasses darken: The text says "When the wearer loses concentration, the glasses darken, and thus the wearer can't see". So, the effect of "The glasses darken" is "The wearer can't see".
• Neurofeedback reveals your brain waves: The text mentions "In neurofeedback, your brain waves are shown to you in real - time so you can learn to focus them in desirable ways". So, the effect of "Neurofeedback reveals your brain waves" is "You can learn to focus".

Answer:

• Technology is a distraction: Concentration is difficult
• The glasses darken: The wearer can't see
• Neurofeedback reveals your brain waves: You can learn to focus