In The Strange Situation Experiment (Ainsworth, 1978), which behaviors are most characteristic of an infant with an insecure avoidant attachment style?

A 5 MHz transducer was used in the imaging situation below. Calculate the percentage energy that was reflected at the interface between medium 1 and medium 2.

A child observes their older sibling calmly solving a difficult puzzle and, inspired by this, attempts a similar puzzle. Over time, the child becomes more confident and skilled. Which theory best explains this?

Why does the use of gel improve the transmission rate?

Lila’s parents are both avid readers and have a natural aptitude for language. Growing up, their home was filled with books, and they often read aloud to Lila. As a result, Lila developed strong reading skills. Which heredity-genotype correlation is illustrated?

How does frequency affect the amount of rayleigh scattering that will occur at a boundary?

Calculate the total attenuation to image the anterior edge of the liver at a depth of 2 cm using a 5 MHz transducer.

What form(s) of attenuation are occurring at the boundary indicated by the red arrow?

An ultrasound beam is directed at a large interface composed of bone and soft tissue.  The angle of incidence is 60°.  The sound beam moves from bone into soft tissue.  Assume the speed of sound in bone is 3080 m/s.  What is the effect on the sound beam.

Which of the following interactions with matter is independent of frequency?