Final Info-Ch. 9 Development Flashcards
absolute light sensitivity reaches adult like levels:
6 months
absolute light sensitivity graph reaches adult like shape:
at birth
infants have more ____ summation
spatial
explain why infants have larger critical areas
Ricco’s law- better at summation than resolution at that age
increment thresholds obey Weber’s law: (slope of 1)
by 2-4 months
increment thresholds obey what law early on?
more like Devries-Rose law
slope of 0.5
grating acuity from 0 to 6 months change is:
develops rapidly
rule of thumb for 0 to 6 months for grating acuity
age in months = S.F.
grating acuity from 6 to 12 months change is:
nothing
grating acuity from 12 months on change is
slow gain
best case scenario for age when grating acuity reaches 20/20 with forced preferential looking is
36 months
best case scenario for age when grating acuity reaches 20/20 with VEP testing is
6 months
you can’t measure vernier acuity by FPL until ___ months of age
2
vernier acuity has rapid improvements during what months?
2-8 months
by ____ months, vernier acuity is better than grating acuity
4-8 months
when is verier acuity at full adult level
about 5 years old
contrast sensitivity has adult shape (band pass) at:
by 2-3 months
contrast sensitivity is adult-like around:
7 years old, but usually later
how is contrast sensitivity different in infants (CSF)?
- reduced sensitivity
- lacking high SFs
CFF is nearly adult like (50 Hz) by:
2-3 months
CFF shape (bandpass) is adult like at:
3 months
color vision using VEPs shows functional MWS/LWS cones at:
2 weeks
color vision using VEPs shows functional SWS cones at:
5 weeks
color vision using VEPs shows “trichomacy” at:
by 5 weeks
color vision using FPL shows red-green discrimination evident as early as
2 months
color vision using FPL shows red-green discrimination is adult like by
1 year
color vision using FPL shows blue-yellow discrimination develops ____ compared to R-G
slower/ slightly later
color vision using FPL shows trichromatic by about ___ (theoretically)
3 months
shapes of luminous efficiency graphs at birth vs. adult like
both have similar shape to adults at birth, but overall less sensitive
using FPL methods, luminous efficiency in scotopic conditions develops at
6 months
for photopic luminous efficiency graph using FPL methods, how is the wavelength sensitivity differ in newborns vs. adults
infants have higher sensitivity to short wavelengths b/c photopigments are not as dense, lens is clearer, and there is no macular pigment
the infant lens is nearly transparent to ___ nm and above
300
the adult lens is transparent above ____ nm
400
motion perception for rapid motion is at adult levels:
at birth
motion perception for slower motion is at adult levels:
improves gradually with age
lid closure in response to bright light develops at:
30 weeks
blink response to visual threat develops:
2-5 months
