When the raise an octave symbol (octave?) 8 - - is present over the treble is the base also played an octave higher?

i played a piece with such notation before and someone told me it means to raise an octave (if the notation is over treble), but it doesn't include the base.

it does not include the bass line.

that's not a dumb question! no question concerning music or piano is dumb.

Thanks guys. The piece makes a lot more sense now.

The 8----------v sign means that everything
on the staff (the 5 lines where notes are
written) that is immediately under it only
is played one octave higher than written.

The 8----------^ sign means that everything
on the staff that is immediately above it
only is played one octave lower than written.

The 8----------v sign is usually seen above
the treble staff and the 8----------^ is
usually seen below the bass staff, but
in theory they could appear anywhere.
So a 8-------v above the base staff would
mean everything written on the bass staff
only is played one octave higher than
written, and, although I don't remember ever
seeing it, a 8------^ under the treble staff
would mean everything written on treble
staff only is played an octave lower than
written. One situation that is seen fairly
often is a 8-----v over the treble staff and
also over the bass staff that is notated as
a treble staff as the lt. hand plays higher
up the keys. This way you can
indicate that both hands are playing further
and further up the keys, even right up to the end
of the keys on the rt. side of the keyboard.