How to watch only one signal in createEffect?

createEffect(() => {
  console.log(a(), b());
});

createEffect(() => {
  console.log(a(), b());
});

createEffect(() => {
  console.log(a(), b());
});

createEffect(() => {
  console.log(a(), b());
});

and

are from two signals,

createEffect

createEffect

will watch both of them.

Is it possible to watch only

while access the value of